COSLUS® Water Flossers | Official Store

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<p>Professional Clean, Beyond the Countertop</p>

ADA Accepted

Professional Clean. Live freely.

Professional Clean, Beyond the Countertop

Live Freely

Professional care that moves with your life.

At Home

At Home

Make professional oral care part of your everyday routine.

At Work

At Work

Refresh your smile whenever the day calls for it.

After a Workout

After a Workout

Feel fresh and ready for whatever comes next.

On the Go

On the Go

Take your oral care routine wherever life leads.

COSLUS E40 water flosser in black color

COSLUS E40 water flosser in black color

Save $60.00

COSLUS E40 10-Level Dial Pressure Control Cordless Water Flosser

$39.99 ~~$99.99~~

COSLUS C20 Dual Stream® Cordless Water Flosser

COSLUS C20(F5020E) Oral Irrigator: Healthy teeth and gums

Save $57.00

COSLUS C20 Dual Stream® Cordless Water Flosser

$42.99 ~~$99.99~~

COSLUS C30 Custom-Mode Cordless Water Flosser

COSLUS C30 Custom-Mode Cordless Water Flosser

COSLUS C30 Custom-Mode Cordless Water Flosser

$24.99

COSLUS C31 Age-Specific Cordless Water Flosser for Kids

Water flosser cleaning teeth with braces, oral hygiene

COSLUS C31 Age-Specific Cordless Water Flosser for Kids

$42.99

Built on Proof. Trusted in Everyday Life.

Professional care is more than a promise—it is something we have spent years building and validating. With five years of focused research and development, 61 core patented technologies, and four ADA Accepted water flossers, COSLUS brings professionally validated oral care and clinic-level oral health protection into everyday routines. Today, COSLUS is trusted by more than 10 million users across the U.S. [ Data source: Internal data, updated August 15, 2026. ]

90.4%

Gum Bleeding Index Improvement

75.7%

Gumline Plaque Index Improvement

15 Days

To Healthier Gums

*Results are based on different clinical studies and testing conditions. Individual results may vary.

<p>Professional Clean. Your Way. </p>

Professional Clean. Your Way.

Compare Water Flossers

Compare key features and find the COSLUS water flosser that fits your routine.

Swipe horizontally to compare all products.

COSLUS E40

Flagship COSLUS E40 Learn More

COSLUS C20

Best Seller COSLUS C20 Learn More

COSLUS C31

For Kids COSLUS C31 Learn More

COSLUS T40

Travel Pick COSLUS T40 Learn More

Flagship COSLUS E40 Learn More

Best Seller COSLUS C20 Learn More

For Kids COSLUS C31 Learn More

Travel Pick COSLUS T40 Learn More

Price

$39.99 $99.99

$42.99 $99.99

$42.99

$29.99

Best For

Sensitive Gums & Precision Control

Everyday Cleaning

Gentle Cleaning for Kids

Travel & On-the-Go Care

Pressure Levels / Modes

10-Level Dial Control

4 Cleaning Modes

4 Cleaning Modes

4 Cleaning Modes

Water Tank

300 mL

300 mL

150 mL

180 mL

ADA Accepted

✓

✓

×

×

Tips Included

5 tips

5 tips

2 tips

4 tips

Warranty

2-Year

2-Year

2-Year

2-Year

Video alt text

Video alt text

Real professional quality

Shouldn’t hold you back

It should set you free

Professional Clean. Live Freely.

COSLUS is dedicated to creating wireless water flossers that make professional-level oral

care simple, comfortable, and accessible for everyone.

Discover Our Story

COSLUS T40 Mini Travel Cordless Water Flosser customer video

COSLUS C20 Dual Stream® Cordless Water Flosser customer video

COSLUS E40 10-Level Dial Pressure Control Cordless Water Flosser customer video

COSLUS E40 10-Level Dial Pressure Control Cordless Water Flosser customer video

COSLUS C31 Age-Specific Cordless Water Flosser for Kids customer video

COSLUS C51 Retractable-Tip Cordless Water Flosser customer video

COSLUS C30 Custom-Mode Cordless Water Flosser customer video