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Extended holiday returns
FREE refund/replacement until Jan 31, 2027 Learn more
FREE refund/replacement until Jan 31, 2027 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Availability:
In Stock.
Arrives
Monday, Nov 16
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At a glance
- Condition
- New
- Color
- Black
- Model
- FC5090
- Dimensions
- 8.68 x 2.91 x 3.19 in
- Material
- Plastic
- Item Nype Name
- Water Dental Flosser
- Power Source
- Battery Powered
- In the box
- 1 Charging Cable1 User Manual5 Replacement HeadsAdapter not includedWater Dental Flosser
Features 6
- Advanced Water Pulse Technology Gentle Enough for Sensitive Gums: Delivers 1,5002,000 pulses per minute across 4 adjustable pressure modes (50150 PSI). Start at the lowest setting to gently flush food debris from inflamed or bleeding gums, then increase pressure as comfort improves. It helps remove food debris and reduce buildup from hard-to-reach areas compared to brushing aloneideal for anyone whose gums bleed with traditional string floss.
- Rechargeable Cordless Design 30 Days on One Charge: A single 3-hour USB charge provides approximately 30 days of daily use (one 2-minute session/day). No proprietary adapter neededcharges from any 5V USB port, laptop, or power bank. Compact enough to fit in a standard toiletry bag for business trips, vacations, or college dorms.
- BPA-Free 300ML Water Tank One Fill, One Complete Clean: The 300ML capacity delivers a full 60-second cleaning cycle without stopping to refill. BPA-free food-grade material ensures no chemical leaching into your water. Detachable tank design makes filling and rinsing fast and hygienic.
- Designed for Orthodontic & Dental Work: Reaches behind archwires, around brackets, under bridges, and along crown margins where string floss and interdental brushes cannot go. Includes 5 specialized jet tips (standard, orthodontic, periodontal pocket, tongue cleaner, and nasal) so each family member can have their own color-coded nozzle. Replace tips every 3 months for optimal hygiene.
- IPX7 Fully Waterproof Shower-Safe & Easy to Clean: Rated IPX7, meaning the entire unit can be submerged in up to 1 meter of water for 30 minutes. Use it in the shower as part of your morning routine without worrying about water damage. Rinse the whole device under the tap after each use for hassle-free maintenance.
- Easy Charging & Maintenance (Adapter Not Included): Charges via standard 5V USB power. Adapter not included, but compatible with any existing 5V charger. For optimal hygiene and performance, replace the nozzle every 3 months.
Description
Why does the Onlyone water dental flosser have 4 modes? Designed with four simple modes, this water flosser provides easy operation for adults, seniors, and teens. Built for everyday use, it delivers reliable performance with a durable design. How long does it last on a single charge? With a single charge, the Onlyone water flosser can last over a month. While usage varies by individual, you can expect a minimum of one month of reliable performance. Will you need to refill the water often during use? No, the upgraded 300ml water tank offers ample capacity, providing enough water for a full 2-minute cleaning session without needing a refill Is the charging adapter included in the package? No, but it’s not an issue. Most people have plenty of adapters at home. The included cable is compatible with your phone adapter and laptop USB port, making charging convenient and hassle-free Where can I buy replacement tips for this travel water flosser? For best results, replace it every 3 months. Replacement accessories are available on our product page and the Onlyone Store. Sonic Electric Toothbrush Sonic Electric Toothbrush Sonic Electric Toothbrush Toothbrush Heads Toothbrush Heads Toothbrush Heads Onlyone is on a mission to make oral care more effective and enjoyable. We strive to promote oral health with cutting-edge water dental flossers, making each flossing a step towards a brighter smile. At Onlyone, quality is the top priority. We design, test, and perfect our water dental flosser with years of research and clinical expertise. We enable everyone to elevate the oral care experience, to live healthier, happier lives.
Specs 21
| Product Dimensions | 8.68 x 2.91 x 3.19 inches; 13.76 ounces |
|---|---|
| Item model number | FC5090 |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Manufacturer | Onlyone |
| Brand Name | Onlyone |
| Product Benefits | Freshen your Breath, Removes Plaque, Improve Oral Health,smile with Confidence |
| Model Number | FC5090 |
| Manufacturer Warranty Description | 1 year |
| Model Name | Onlyone FC5090 |
| UPC | 198715558647 |
| Item Nype Name | Water Dental Flosser |
| Manufacturer Part Number | FC5360 Black |
| Power Source | Battery Powered |
| Additional Features | Portable |
| Unit Count | 1 Count |
| Item Dimensions | 8.68 x 2.91 x 3.19 inches |
| Tank Volume | 300 ml |
| Recommended Uses For Product | Daily Cleaning |
| Target Use Body Part | Teeth |
| Color | Black |
| Material Type | Plastic |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 16
Yes, absolutely! This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great Water Flosser at a Good Price!
Color: Black
I've been using the Onlyone Water Flosser for about 12 months now, and I'm really impressed with it. My dentist has been pushing me to water floss more consistently due to a wisdom tooth issue and this cordless model makes it so easy to use daily, the battery lasts 2 weeks Pros - The 300ML tank is a huge plus, I don't have to refill it as often as my old model. Gets me through a full mouth cleaning easily. - Adjustable water pressure is excellent. I started on low for my sensitive gums and can now dial it up to medium without any discomfort. The pressure levels actually make a difference. - Battery lasts forever. I charge it every few weeks with regular daily use, which is way better than I expected for a cordless device. - Super portable and lightweight. I bring it on work trips in my carry-on with zero issues. - Quiet operation, doesn't sound like a mini jet engine like some other brands I've tried. - Price point is unbeatable compared to similar products. Felt like I was getting premium features without breaking the bank. Cons - The tip replacements are a bit pricey if you need extras, though they do seem to last a while. - I had an issue while replacing tip with the replacement part breaking and staying inside but i was able to get it out. Highly recommended!
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Reviewed in the United States on September 11, 2026 by Harsh Kaul
Great Water Flosser for Daily Use
Color: Black
I’ve been using this water flosser regularly and have been very happy with it. The 300 mL tank is large enough to get through a thorough cleaning without constantly refilling it, and the adjustable pressure settings make it easy to start on a lower setting and work your way up. It does a great job getting food and debris out from between my teeth, even after brushing, and leaves my mouth feeling noticeably cleaner. The battery life is also excellent. I can go weeks between charges with regular use, which makes it especially convenient for travel. It’s lightweight, easy to use, and comes with several interchangeable tips. For the price, I’m impressed with the performance and features. It has made water flossing easy enough that I actually stick with it consistently. Definitely a good value and something I’d recommend for anyone looking to add a water flosser to their daily routine.
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Reviewed in the United States on September 20, 2026 by Emanuel A.
This is the best bargain and best flosser out there!
Color: White
I’ve been using the OnlyOne dental flosser for over a year and I love it. This dental flosser beats WaterPic and other brands in effectiveness, price, ease of use, engineering, and customer service. I like that the water tank holds more water, and it gets literally everything out from between my teeth. The settings work well, it’s easy to clean, not too loud. In my book, it wins hands down. My teeth and gums have never been so healthy and clean. I recently had my annual dental exam and my dentist congratulated me on having such well-cared for teeth. After about 11 months of daily use the battery wasn’t holding a charge. It was still under warranty, so I contacted the company, and they kindly sent me a new dental flosser. I’m very happy with this!
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Reviewed in the United States on October 16, 2026 by Carol Woodward
Improve oral hygiene at a reasonable cost!
Color: Black
My last experience with a water flosser was in the ‘60’s, when it served as a good way to ambush a sibling more often than for its intended use. Did not feel enthusiastic when my hygenist suggested I re-visit the water flosser experience. I was, however, very pleasantly surprised with this flosser. Though I pride myself on consistent string flossing, I concede that a water jet is better. Even after concentrated string flossing, brushing and vigorous rinsing, the number of bits dislodged by this water flosser was humbling, and I am a convert to the practice. The Onlyone flosser is surprisingly compact, especially considering the amount of water that it holds. It has different pressure settings and nozzles, so you can finetune your water flossing experience. I really like its simple design and portability, and use it every time I brush. The only change I would like to see is to drop the proprietary charger connection in favor of industry standard. I heartily recommend water flossing, and this flosser is an excellent way to tune up your oral hygiene at a very reasonable cost.
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Reviewed in the United States on September 21, 2026 by Amazon Customer
Worth every penny, highly recommend
Color: Black
I just bought a second flosser. I purchased a much more expensive name brand flosser two years ago. The replacement parts are super expensive. I bought this flosser for my son, it worked every bit as well as my expensive flosser. My flosser has sat on my vanity unused for the past year or so because it broke. I am so excited to get this flosser. The replacement parts for it only cost $6 and the power is amazing. This flosser come pre charged so you will be able to use it straight out of the box. My teeth feel amazing after using this flosser. My mouth is so clean and my gums feel good.
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Reviewed in the United States on September 28, 2026 by Fluffywumpkins
Works as well as can be expected and at a great price.
Color: Black
This is the strongest pick for pulse and psi and it has a large tank. You can definitely feel the power on hi. I brush with 2 different tooth pastes using an electric brush and I am always amazed at how much stuff still comes out when using this pick. It used to have an Type A to Type C cord and that is what I thought this one would have but instead its Type A to figure 8. This may be an improvement but I am unsure yet as my last pick lasted just over 2 years but the cord died within 6 months. As everyone pretty much has the A to C cords it was not an issue. If this one goes out its under warranty for 2 years so we will see. This style has a button for releasing the flosser nozzel and I recommend using it for also insertion. Wet the nozzel base to lubricate it prior to insertion. If you do not do this the nozzel will wear out at the ribbed edge. Look into the port and you will see 2 wires that expand out when the button is pressed. That is what will wear down the ribs. The nozzels will eventually clog if you do not clean them on occasion with vinegar or something else if you have hard water. I used a fine needle to unclog mine as I didn't use the vinegar soon enough..
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Reviewed in the United States on October 16, 2026 by Robert Allen
Great flosser
Color: Black
I really like this flosser. I won't lie, up to about a month and a half I did not floss. Even though it's something that has been recommended by my family and my dentist for many years, something about a wet string touching my face and fingers felt weird and I never kept the habit for over 3 days. After I told this to my dentist, his assistant told me she used to struggle with flossing for the same reason and that after she had learned about water flossers she now flossed every day. I was hesitant to buy but I'm super glad I did. The power has been great, so far only had to charge once in over a month, and it only took about 1 1/2 hours. I worked my way up to medium level which I feel works best for me, it only hurt the four days and after that I've felt no discomfort at all. The settings are clear and easy to understand to find what works best for you. It's not loud at all, and it keeps the same consistency the entire time. I keep this on top of the sink and it really takes no space. It only takes me about 2 minutes to floss and I can feel the difference, my breath feels fresher even after waking up, sometimes I can see that pushes away bits of food or meat after I brushed my teeth. I give this a 10/10. It really is game changer, I never flossed and now I do almost every single night.
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Reviewed in the United States on September 10, 2026 by Dika
The flosser will get the job done but it's not a 5* product.
Color: Black
Let's get straight to it the cons: -The on/off switch is poorly placed and requires a 1 second hold to activate. Be prepared to shoot water everywhere at first until you get used to it. This could have been avoided using a slide switch or a press to hold button (preferred since it'll turn off immediately after releasing the button). -The water strength settings are too limited with 2 options. I say 2 because Low is practically worthless. Unfortunately, the strength is a personal preference and some may find H too strong but M too weak. A solution to this issue would have been to use a rotary dial or have 5 settings instead of 3. I use M because I find H too strong (especially when the stream hits my tongue). -If you note the image of the flosser and the buttons are turned inward, consider this a moment as you're holding it while using it. The settings button is located directly below the power button (of course it is), and I've found myself changing speeds during use as I shift and turn the until while flossing. Be prepared to do the same, though I have no solution for this other than having the button moved to a location the hand isn't going to touch them. Maybe the designers think people change speeds during use? I have adapted the best I can by ensuing my fingers are wrapped around the outside of the base, but it's not perfect. Now let's talk about the pros: -Despite the limitation of the speed settings, the pump is very strong. This is why I believe a rotary dial would have been better suited as this would allow us to use the pump's full potential based on our need. This is the reason people "complain" about the small water tank. It's not small, per se, it's just the pump does a really great job of moving water. Yes, you will likely need to refill the tank while using it if you're deep cleaning, especially for those who wear braces. I don't mind this because it's very easy to fill. -It's light weight, even with a filled tank. I was impressed. I had expected the battery to be heavy, but overall, it's easy to hold and use. -The small size makes it nice to set on a sink top without taking much room. I set mine next to the tooth brush holder, which I couldn't do with the electric version I replaced. -It's quiet. Such a pleasing yet small change after years of using the electric version with its grinding pump noise. The little things matter. Overall, my rating is primarily based on the button options and locations and the lack of variable flosser speeds. For the price, I recommend it to see if it works for you. Just be prepared it may not be and a return may be necessary. I will be keeping mine despite the issues, but I will not buy another one until changes are made. Thanks for reading and I hope this helped you today.
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Reviewed in the United States on October 7, 2026 by Online Shopper