Are you trying to find oil refill for diffuser sticks among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling oil refill for diffuser sticks on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 23 hours of research and did 17 oil refill for diffuser sticks tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best oil refill for diffuser sticks you can buy today
- Clean Linen Scent: Keep it clean with air. Crafted with notes of Crisp Air, Fresh Laundry and Lily of the Valley, this fragrance is masterfully designed to give you all the fresh feels.
- Includes: One fragrance diffuser glass bottle, 6.7 fl oz mixture of essential oils combined with fragrance, and 8 pure cotton sticks. Adjust the amount of aroma released by adding or removing the sticks.
- Long-lasting Scent: Enjoy up to 90 days of fragrant aroma. Once the reeds absorb the fragrance and release it in the air, it will subtly diffuse the scent across the room for weeks.
- Replacements for Reed Diffuser: Create your own diffuser with our diffuser oil refill.
- Ideal Gift: Perfect for yourself, family, and friends for any occasion, including holidays, birthdays, housewarming parties, dinner parties, and thank you gifts.
- 【Premium Material】Our reeds diffuser sticks are made of high quality rattan, which is porous and lightweight with processed with mildew proofing and drying treatment, so they will not get mouldy
- 【Aroma Diffuser Sticks】 Ideal replacement reeds for diffuser, aroma of your essential oil or liquid aromas, which helps to create natural and relaxing aromas. Each Oil sticks contains "channels" inside for better absorption and diffusion of oil
- 【100 Value Pack】Oil reed diffuser replacement sticks are 10" in length and 3mm in diameter which is the ideal and standard size for to apply with diffuser. Each box comes with 100 diffuse reeds in natural wood color
- 【Widely Used】This set of reed diffuser sticks can help to release the aroma into the air, you can DIY your favorite fragrance with these diffuser sticks to refresh air in living room, kitchen, bathroom, bedroom, office, wedding, etc
- 【Easy to Use】Place reed sticks into diffuser bottle, make the whole stick wet, the fragrance of the essential oil will volatilize through these porous diffuser sticks
- White Jasmine - A scent having the scent of alluring white jasmine and rich and gentle scent unique to tuberose at the same time.
- !!! CHECK POINT : The date indicated on the product is the date of manufacture. / SAFETY - Our fragrances are free from trichloroethylene, didecyldimethylammonium chloride, toluene, xylene and styrene and adhere to IFRA standards and regulations.
- EASY SCENT CONTROL AND LONG-LASTING FRAGRANCE - Elegant refill bottle is 6.7 oz (reed sticks are not included). You can choose to add or remove the number of reed sticks to match your taste. It takes 1 or 2 days for the fabric sticks to soak in the scent. When the fragrance weakens, simply turn the reed sticks upside down or replace them with new ones.
- THOUGHTFUL GIFT IDEA - It is a thoughtful gift idea for weddings, birthdays, housewarming parties, Christmas, holidays, Mother’s day, and Father’s Day. Give joy to your parents, friends, colleagues, and customers with our luxurious cocodor diffusers.
- 🌿 A Soothing & Relaxing blend of Eucalyptus, Sage, Mint, Lime and Cedarwood.
- 🌿 EXPERIENCE THE LUXURIOUS AROMA OF NATURE: Our diffuser oil refills, crafted with premium essential oils, offer a pure fragrance that transforms any space into a serene haven. Each bottle is meticulously blended to ensure a consistent & long-lasting scent, free from artificial chemicals. Perfect for enhancing your living room, bedroom, or office, our oils are non-toxic, cruelty-free, and free of phthalates & alcohol for a cleaner, greener scent solution that supports a healthier lifestyle.
- 🌿 Convenient & Long Lasting! Lasts for months without lifting a finger. No flame required. Unlike candles, reed diffusers do not require a flame, making it a much safer way to scent any room. The duration of aroma from incense or candles is conditioned by the way they burn. Reed diffusers last all day & night and the reeds only need to be flipped over once or twice a week. Complete set includes: Clear Glass Bottle filled with oil, a bundle of fragrance reeds & a beautiful box worthy of gifting.
- 🌿 Excellent Gift Idea! Makes a unique and elegant gift for any occasion. Whether it is time for the winter holidays, a friend or family member’s birthday, a wedding, or any other gift-giving occasion, selecting the right item to give to someone can feel like quite the challenge. Urban Naturals diffusers make a great gift every time because EVERYONE loves for their home, office, dorm, apartment or bedroom to smell nice!
- 🇺🇸 PROUDLY MADE IN THE USA: As a family-owned business, we take pride in our commitment to quality and customer happiness. If you're not completely satisfied with our products, please reach out to us. Your satisfaction is our top priority.
- REED OIL DIFFUSER REFILL: 5.9-fluid ounce refill of alcohol-free fragrance diffuser oil ideal for home relaxation and ambience; NEST New York reed sticks sold separately
- WOODY AND SEDUCTIVE: Moroccan amber, sweet patchouli, heliotrope, and bergamot with a hint of eucalyptus
- LONG-LASTING ELEGANCE: Convenient refill bottle offers continued use of existing NEST New York reed diffusers for approximately 90 days
- CRUELTY FREE: These richly scented oils are vegan and made in the USA without animal testing
- NEST NEW YORK: Where mood is elevated and scent is celebrated
- Mixed fruity and floral oil refill is a combination of the fragrances of lavender, vanilla, jasmine and bergamot to diffuse a sweet and fresh aroma.
- Contains 9.85 fl. oz/280ml of fragrance oil. Bigger capacity and stronger scent with a competitive price compared to other reed diffuser oil refills.
- Includes 6 sticks so you can replace them in your reed diffuser. It's a bonus.
- Vegan and cruelty-free. Never tested on animals, free of nasty preservatives so you get the most natural fragrance oil refill.
- Provide longer lasting fragrance. 9.85 fl. oz/280ml of aroma oil refill can create a refreshing scent for up to 180 days continuously. The longest usage time in the market.
- Lavender Reed Diffuser Refill to bring scent of Lavender, calmness and tranquility to any space. We love Lavender Oil for its relaxing, floral scent. You will fill a wave of calm over your entire body
- REED OIL DIFFUSER for a wonderful LONG LASTING fragrance. Contains 500ml of Lavender oil diffuser refill. The more sticks you add, the stronger the scent
- BEAUTIFUL VERSATILE LAVENDER OIL AROMA will promote calmness and wellness, all unpleasant odors will be removed. Oil diffusers are ideal for office spaces or home areas, guest toilets and bedrooms
- CALMING & REFRESHING properties make Lavender Essential Oil the best oil to help relax mind & body. Just pour the refill into a clean diffuser bottle insert sticks and enjoy of a new aroma world
- Home fragrance reed diffusers are flame free and breathe a beautiful scent naturally into the air of your space. TRUST THE POWER OF NATURE to dive into the aroma world of TM 'Aromatika' !
- 🎄 FESTIVE HOLIDAY SCENT - Fresh Evergreen, Crisp Berries & Subtle Spice Notes Are Perfectly Balanced In This Winter Holiday best-seller. Top off your existing LOVSPA essential oil reed diffuser economically with our 4 oz refill. Packaged in recyclable PET bottles for zero waste, just decant the liquid into your decorative diffuser bottle whenever needed.
- 🎄 REPLACEMENT REEDS INCLUDED – Fragranced oil refill comes in an elegant 4-oz. bottle with resealable so you may use what you need and save the rest for later. Includes an extra set of reeds to optimize performance throughout the life of the diffuser. Replace the first set of reeds when the diffusion rate slows down.
- 🎄 EASY TO USE – Simply refill your glass LOVSPA diffuser bottle or use your own glass container and place reeds (included) in the diffuser bottle. Reeds absorb the scented oil, draw it to the top and diffuse it into air. Our oil refills are the perfect way to refill an existing diffuser or create a dramatic diffuser accessory of your own.
- 🎄 LONG LASTING SCENTS – Available in many of our signature scents and more coming soon! When assembled, the essential oils in each bottle absorb into the natural reeds to gently fill the room with fresh, clean aroma. Extend the life of your favorite scented reed diffusers with our convenient and easy-to-use refill oil. Fragrant for 120 days. 4.0 oz.
- 🎄 TRANSFORMATIVE FRAGRANCES – Replenish your Reed Diffuser Liquid with our NEW & CONVENIENT Refills - available online only and fill your home with the transformative fragrance of our signature aromatic scents. LOVSPA reed diffuser refills continuously deliver a long lasting, true-to-life scent gently throughout its surroundings.
- Vanilla Lavender : A scent of blends natural vanilla and lavender. Lavender scent with gentle mint creates cozy air.
- TOP NOTES : Bergamot, Apple, Spearmint / MIDDLE NOTES : Lavender / BASE NOTES : Vanilla, Cotton
- INCLUDES : One bottle of fragrance diffuser oil 16.9ounce and fiber reed stick 10pcs.
- SAFETY : Free from trichloroethylene, didecyldimethylammonium chloride, toluene, xylene and styrene.
- IDEAL GIFT : It is a Perfect gift idea for weddings, birthdays, housewarming parties, Christmas, Valentine's day, holidays, Mother’s day, and Father’s Day. Give joy to your lover, parents, friends, colleagues, and customers with 396st. Reed diffuser sets.
- Our ‘Sandalwood Scent’ offers a perfect aroma to relieve stress and to restore and revitalize your senses. Sandalwood can relaxes and soothes the mind, and brings balance and harmony.
- You can choose to add or remove the number of sticks to match your taste. It takes 1 or 2 days for the fabric sticks to soak in the scent. When the fragrance weakens, simply turn the sticks upside down or replace them with new ones.
- It is a thoughtful gift idea for weddings, birthdays, housewarming parties, Christmas, holidays, Mother’s day, and Father’s Day. Give joy to your parents, friends, colleagues,
- Charm your space and channel good vibe energy into your home living or office spaces. This safe and toxic-free satisfy your space without any effort needed. Simply choose a high traffic area where there is good air circulation that will help the fragrance dispersal, so the pleasant aroma can fill the room effectively.
- Scent your space with natural and sweet fruity and floral fragrance to eliminate the bad smells. Put it in the bedroom. living room, bathroom, kitchen, hallway and office to add a fresh smell and fashion to the environment.
- Clean linen:Our Reed Diffuser Oil releases a clean and invigorating scent,transforming any space into a rejuvenating oasis.
- Superior quality: Crafted from high-quality ingredients,Airkeep reed diffuser oil refill is designed to deliver a consistent and potent fragrance experience. The premium oils used in our refill ensure a strong and pleasant aroma that lingers in the air.
- Convenient Refill Option: With our easy-to-use design,refilling your reed diffuser is a breeze. Simply pour the refill oil into your existing diffuser, Keep your home smelling fresh and inviting.
- Long-lasting fragrance:Our reed diffuser oil refill is specially formulated to provide a long-lasting and continuous release of fragrance.
- Thoughtful Gift Idea：It is a thoughtful gift idea for weddings, birthdays, housewarming parties, Christmas, holidays, Mother’s day, and Father’s Day. Give joy to your parents, friends, colleagues, and customers with our Airkeep reed diffusers.
- Scent: Warm and comforting, the sweet scent of vanilla enhances the feeling of coziness on lazy days.
- Size: 6.7 fl oz mixture of essential oils.
- Premium Quality: Cocorrína scented oil refill is a premium quality fragrance oil that is designed to infuse your living space with a captivating and refreshing scent.
- Revive your space with our premium reed diffuser oil refill, a thoughtful and aromatic gift choice.
- Long Lasting: The fragrance of Cocorrína scented oil refill is long-lasting, and it can provide your home with a delightful scent for 90 days.Perfect. Perfect for yourself, family, and friends for any occasion, including holidays, Valentne's Day,birthdays, housewarming parties, dinner parties, and thank you gifts.
- ✿【Diffuser Sticks Size】50PCS aroma diffuser stick is 7.5inches in length and 3.5 mm in diameter, These are perfect replacement reeds for oil diffusers.
- ✿【Natural Thicker Diffuser Sticks】These reeds are 3.5mm thick rather than the common 3mm rattan sticks. One thicker reed will likely emit more scent than two thinner ones. So your supply of reeds will last longer than buying a cheaper alternative.
- ✿【Eco Friendly Fibre Materia】These Fibre reed diffusers sticks are lightweight, porous. Unlike the rattan alternatives, these are smooth and uniform in shape. Not only will they scent your room beautifully, they can also act as a decorative piece for your home.
- ✿【Home Decorative】Fibre Reed sticks are ideal if you need reed diffuser sticks refills as they work well with alcohol, water and oil based fragrance diffuser products. So look no further if you need to top up your scented oil diffusers with new premium reeds. Using a reed diffuser is a form of aromatherapy and has proven psychological benefits.
- ✿【 Serve】Our worry-free 18-month warranty and friendly customer service.
- LONG-LASTING SCENTS - Large capacity of 6.8 oz, fragrant for more than 120 days! Extend the life of your favorite scented diffusers with our convenient and easy-to-use refill oil. Nevaeheart diffuser refill oil continuously delivers a long-lasting, true-to-life scent gently throughout its surroundings.
- AIR FRESHENER-Scent your space with natural fruity and floral fragrance to eliminate odors. Place it in the bedroom, living room, bathroom, kitchen, hallway, and office to instantly freshen the air and add décor.
- SAFE FORMULA - Natural fragrance alcohol-free. Nevaeheart reed-diffuser is composed of natural plant essential oils & organic solution, with a mild, lasting & stable fragrance. and adhere to IFRA standards and regulations.
- EASY TO USE - Simply refill your Nevaeheart glass diffuser bottle and place reeds (included) in the diffuser bottle. Reeds absorb the scented oil, draw it to the top, and diffuse it into the air. Our oil refills are the perfect way to refill an existing diffuser or create a dramatic diffuser accessory of your own.
- THOUGHTFUL GIFT IDEA - It is a thoughtful gift idea for weddings, birthdays, housewarming parties, Christmas, holidays, Mother’s Day, and Father’s Day. Give joy to your parents, friends, colleagues, and customers with our NEVAEHEART diffusers.
- Aromatic Lavender, Sage & Mint Scent: Featuring subtle lavender, cleansing sage, and refreshing mint, our fragrance diffuser creates a relaxing ambience in your home.
- WHAT YOU GET - 5.75 oz premium natural lavender, sage & mint mixture essential oil. A perfect fit for the Craft & Kin Reed diffuser bottles.
- HOW TO: Step 1 - Clean the Diffuser Bottle. If you are reusing the same diffuser bottle, clean it thoroughly with warm, soapy water to remove any residue from the previous oil. Rinse it well and let it dry completely.
- HOW TO: Step 2 - Add the Fragrance Oil. Pour the new fragrance oil into the clean, dry diffuser bottle. Fill it about three-quarters full to avoid overfilling, which can cause spills
- HOW TO: Step 3 - Insert New Reeds. It's generally recommended to use between 4-8 reeds depending on the desired intensity of the fragrance. More reeds will result in a stronger scent
- Tip 1: Experiment with the Number of Reeds - Adjust the number of reeds to control the scent intensity. Fewer reeds for a subtler scent, more reeds for a stronger aroma
- Tip 2: Avoid Spills - Be careful when handling the oil and flipping the reeds to avoid spills, as the oil can stain surfaces
- 🌿 SMELLS LIKE: A Soothing & Relaxing blend of Eucalyptus, Sage, Mint, Lime and Cedarwood.
- 🌿 Need an oil refill for your Reed Diffuser Set? We've got you covered. Or make your own DIY diffuser with our reed diffuser oil! Free of phthalates & alcohol. Each 8 oz bottle lasts 6+ months. Our oils are carefully crafted to fill the room with long lasting, subtle fragrance. Need extra reeds? Checkout our storefront for high quality reeds at unbeatable prices! Every person desires to have a lovely and beautifully scented home.
- 🌿 Convenient & Long Lasting! Lasts for months without lifting a finger. No flame required. Unlike candles, reed diffusers do not require a flame, making it a much safer way to scent any room. The duration of aroma from incense or candles is conditioned by the way they burn. Reed diffusers last all day & night and the reeds only need to be flipped over once or twice a week. Complete set includes: Clear Glass Bottle filled with oil, a bundle of fragrance reeds & a beautiful box worthy of gifting.
- 🌿 Excellent Gift Idea! Makes a unique and elegant gift for any occasion. Whether it is time for the winter holidays, a friend or family member’s birthday, a wedding, or any other gift-giving occasion, selecting the right item to give to someone can feel like quite the challenge. Urban Naturals diffusers make a great gift every time because EVERYONE loves for their home, office, dorm, apartment or bedroom to smell nice!
- 🇺🇸 PROUDLY MADE IN THE USA & GUARANTEED SATISFACTION: As a family-owned business, we take pride in our 100% satisfaction guarantee. If you're not completely happy with our products, we'll quickly replace or refund your order. Our commitment to quality and customer happiness is unmatched.
- ✿【100 Diffuser Sticks】HOSSIAN Reed diffuser sticks can not only help you to release the aroma of your essential oil or liquid aroma jars, but also helps to create a natural relaxing aroma.
- ✿【Diffuser Reeds Size 】 Every aroma diffuser stick is 7 inches in length and 3 mm in diameter.
- ✿【Natural Rattan Sticks】These wood sticks are made of Indonesia wild rattan, which is porous and lightweight, and they have been processes by drying treatment, safe to use for a long time.
- ✿【Diffuser Reeds Use】The aroma of the essential oil will volatilize through these porous diffuser sticks to release the aroma for better absorption and diffusion of oil.
- ✿【Serve】Our worry-free 18-month warranty and friendly customer service.
- New formula Eucalyptus & Lavender, more advanced scent and longer lasting than the old one.
- Natural: Gentle and long-lasting aromatherapy are made from a combination of natural plant essential oils and organic solutions, alcohol-free, Whether it's a home, office or hotel you can use with confidence.
- Long-lasting: 120ml (4 fl oz) large volume of essential oils + free high performance diffusion sticks for you to fragrance your room for up to 60 days per bottle(2-4 fiber stick is recommended)
- Package Contents: 1 bottle of long-lasting and strong high-quality liquid aromatherapy(while sending you 6 free black fiber rods), 1 box.
- After-sales: You can contact us with any questions, we will solve all the problems you encounter as quickly as possible!
- 【Natural fragrance】Our reed diffuser is made of natural plant extracts, bringing a natural, fresh fragrance to your space, making you feel like you are in a sea of flowers
- 【High quality essential oils】The use of high-quality plant extracts ensures the purity and quality of the essential oils, allowing you to enjoy the purest aroma.
- 【Extra large capacity】 reed diffuser set has 300ML(10.14 Fl Oz) capacity of aromatic essential oils, the fiber reeds absorb the fruity and floral scents, keep the space ventilated，Continuously emits a captivating aroma that brings a pleasant ambiance to your space for a long time.
- 【Long-lasting and stable fragrance】rattan diffusion bar effectively absorbs the fragrance oil, air circulation and natural slow evaporation, the aroma quality is stable for a long time will not deteriorate, the scent is long-lasting and It creates a cozy and pleasant atmosphere for you and enhances the texture of the space.
- 【Suitable for all kinds of home decor】Our reed diffuser is perfect for your living room, kitchen, master bedroom, dining room, reception, den home decor. It is also suitable for office receptions and conference rooms. , It can immediately eliminate odors and add freshness to the air. It is a perfect air freshener decoration。
- FRASIER FIR FRAGRANCE - The aromatic snap of Siberian Fir needles, heartening cedarwood and earthy sandalwood combine to create a just-cut forest fragrance that evokes warmth and comfort.
- SCENT FOR ALL SEASONS – Get in the holiday spirit all year long with the fragrant mountain fresh pine scent of Frasier Fir.
- SET THE MOOD FOR MEMORIES - Thymes’ Frasier Fir scent sets the mood for holiday memories, inviting the classic pine scent into your home.
- CONVENIENT REFILL - Refresh your Frasier Fir Reed Diffuser with this convenient oil refill.
- THYMES FRAGRANCES - Thymes fragrances are composed in our on-site fragrance studio, where our chemists and perfumers blend nature, art and science to create outstanding products.
How to choose a good oil refill for diffuser sticks
Does the idea of finding a fantastic oil refill for diffuser sticks make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in oil refill for diffuser sticks. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top oil refill for diffuser sticks products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top oil refill for diffuser sticks on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top oil refill for diffuser sticks brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top oil refill for diffuser sticks based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the oil refill for diffuser sticks were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good oil refill for diffuser sticks, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your oil refill for diffuser sticks.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting oil refill for diffuser sticks for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our oil refill for diffuser sticks. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what oil refill for diffuser sticks should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on oil refill for diffuser sticks.
