Is the COSLUS water flosser battery powered?

No. It is a corded countertop unit that plugs into a wall outlet. There is no battery to charge or replace.

How often do I need to refill the tank?

The 600 ml tank typically covers a full flossing session, so most users refill once per use rather than mid-session.

Is it good for braces or sensitive gums?

Yes, if you start low. The 12 pressure levels let you begin at a gentle setting and work up, which suits braces, bridges and sensitive gums.

How does it compare with a Waterpik countertop model?

It offers a similar large-tank, multi-level format at a lower price. Waterpik has a longer track record and more nozzle options; the COSLUS wins on price.

What comes in the box?

It ships as a gift set with the flosser base, a water tank and interchangeable jet tips. Check the listing for the exact tip count.

When is the best time to buy it?

At $36.95 at Walmart as of November 7, 2026, it is near the bottom of its recent range. Waiting for a deeper cut is unlikely to save much.

Where is the COSLUS Water Flosser for Teeth cheapest?

At Walmart, for $36.95, as of our latest check.

What do buyers say about the COSLUS Water Flosser for Teeth?

Rated 4.4 out of 5 from 425 ratings.

Where can I buy the COSLUS Water Flosser for Teeth?

3 stores we checked sell it, including Walmart, Best Buy, Coslus.

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COSLUS Water Flosser for Teeth

Best price now

$36.95at WalmartVerified

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Walmart

COSLUS Water Flosser for Teeth

Best price now

$36.95at WalmartVerified

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Walmart

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Our take on the COSLUS Water Flosser for Teeth

The COSLUS is a corded countertop water flosser with a 600 ml tank, 12 pressure levels set by a rotary dial, and a 3x debris-removing jet. It is a family-oriented unit: the large tank cuts refills, and the base stores nozzles hygienically. At $36.95 at Walmart as of November 7, 2026, it sits at the low end of its recent range, making it one of the cheaper countertop flossers per dollar of tank capacity.

Best forFamilies sharing one flosserPeople with braces or bridgesShoppers who want a large tank without paying Waterpik pricesAnyone replacing string floss at home

Pros

600 ml tank gives long uninterrupted flossing sessions
12 pressure levels from gentle to strong
Rotary dial is easier to set than push buttons
Onboard nozzle storage keeps tips clean and together
Countertop power means no charging and no battery to wear out
Low price for the tank size and level count

Cons

Corded design needs an outlet and counter space
Bulky footprint at roughly 8 x 4 x 6 in
No battery, so it is not truly travel-friendly despite the listing
Pressure at the top settings can feel harsh for sensitive gums
Single user profile; no memory for saved settings

COSLUS Water Flosser for Teeth prices at every store

WalmartNew
In stockSold by CoslusmyjReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$36.95Free shippingVerified
Visit Walmart
Best BuyNew
In stock
$49.99Free shippingObserved at 11:38 PM
Visit Best Buy

Also available at

WalmartCheck price at Walmart
CoslusCheck price at Coslus

Store links may earn us a commission. Some prices via Klarna.

COSLUS Water Flosser for Teeth price history

Lowest price we've seen: $39.99 on Nov 7 at Walmart. Tracked across 3 stores since Nov 7.

What reviewers say

4.4 / 5425 ratings

Owners rate it 4.4 out of 5 across 425 ratings and mostly praise the large tank, the range of pressure settings and the value. Complaints center on the size on the counter and on strong pressure at high settings.

What people mention

Tank capacityPraisedOwners like the 600 ml tank because it lasts through a full flossing session without refilling.
Pressure settingsMixedThe 12 levels are useful, but several users find the upper settings too strong for sensitive gums.
ValuePraisedBuyers say it delivers countertop-flosser performance for well under the price of big-name rivals.
SizeCriticisedThe unit takes noticeable counter space, which some owners find inconvenient in small bathrooms.
SetupPraisedAssembly and first use are described as quick and straightforward.

About the COSLUS Water Flosser for Teeth

COSLUS redefines professional oral care with cutting-edge innovation and thoughtful design, crafted for families seeking efficiency, adaptability, and superior performance. This countertop water flossers for teeth combining 3x debris-removing power,12 customizable pressure levels, Large-capacity tank and hygienic storage systemsimplify daily routines, while the intuitive rotary pressure control effortless, durable use for all ages. Isn’t just a tool—it’s a commitment to elevating health, one mindful floss at a time.

Specifications

actual_color: WhiteSource
color: WhiteSource
Volume Capacity: 600 ml
Power Type: Corded Electric
Dimensions: 8.11 x 4.25 x 5.67 in
Batteries Req: N

Questions and answers

Is the COSLUS water flosser battery powered?: No. It is a corded countertop unit that plugs into a wall outlet. There is no battery to charge or replace.
How often do I need to refill the tank?: The 600 ml tank typically covers a full flossing session, so most users refill once per use rather than mid-session.
Is it good for braces or sensitive gums?: Yes, if you start low. The 12 pressure levels let you begin at a gentle setting and work up, which suits braces, bridges and sensitive gums.
How does it compare with a Waterpik countertop model?: It offers a similar large-tank, multi-level format at a lower price. Waterpik has a longer track record and more nozzle options; the COSLUS wins on price.
What comes in the box?: It ships as a gift set with the flosser base, a water tank and interchangeable jet tips. Check the listing for the exact tip count.
When is the best time to buy it?: At $36.95 at Walmart as of November 7, 2026, it is near the bottom of its recent range. Waiting for a deeper cut is unlikely to save much.
Where is the COSLUS Water Flosser for Teeth cheapest?: At Walmart, for $36.95, as of our latest check.
What do buyers say about the COSLUS Water Flosser for Teeth?: Rated 4.4 out of 5 from 425 ratings.
Where can I buy the COSLUS Water Flosser for Teeth?: 3 stores we checked sell it, including Walmart, Best Buy, Coslus.