Amazon is selling a customer-favorite water flosser for only $30, and I use it every day

It's an essential part of my oral hygiene routine.

Mar 14, 2025 - 17:20
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Amazon is selling a customer-favorite water flosser for only $30, and I use it every day

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Taking care of your teeth is as important as eating a balanced diet and getting enough sleep. But if you want to take your oral hygiene to the next level, you're going to need a water flosser.

The Coslus Water Flosser caught my eye last year and has been an essential part of my routine ever since. Luckily, it's on sale at Amazon for 25% off. With an original price of $40, you can get it for $10 off, making this must-have only $30. 

Coslus Water Flosser, $30 (was $40) at Amazon

Courtesy of Amazon

Get it.

Although I floss my teeth daily, I wanted to be extra thorough after getting Invisalign. I used a different water flosser for a while, but upgraded to the Coslus Water Flosser and found that it truly delivered with a deep clean, particularly when it comes to water pressure, water tank size, and battery life.

The Coslus Water Flosser has ultra-fine dual-thread water pulse technology that gets in between your teeth and tackles spots that regular flossing may have missed. There are three modes you can choose from: clean, soft, and massage. With more sensitive gums, I opted for the "soft" mode initially, but now I stick to "clean," which is a little stronger.

With a 300-milliliter water tank, I found that I don't have to refill it as often as my old water flosser. Of course, that makes it significantly more convenient and easy to use.

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Then, there's the battery life. It's intended to last for 30 days between charges, and I can attest that it really does last for quite some time. My last water flosser had to be charged every few days, and I would notice a decrease in water pressure after a few uses. But with the Coslus Water Flosser, I rarely have to worry about recharging it. And when I do, it only takes a few hours.

It comes with five interchangeable flossing tips, including two standard jet tips, one periodontal jet tip, one orthodontic tip, and a tongue cleaner. I've been using the standard tips, but the periodontal option has a soft end that's extra gentle on the gums, and the orthodontic tip has a brush end that you can use for braces, bridges, and even Invisalign attachments.

I also have to add that I love its cordless and lightweight design. I primarily use it at home, but I can easily pack it in my weekender bag and take it on a trip.

The Coslus Water Flosser has been my go-to water flosser for a year, and I can't recommend it enough. Shop it now while it's on sale for only $30 — it's well worth the investment.