COSLUS E40 Cordless Water Flosser, 10 Pressure Settings

The COSLUS E40 water flosser is a battery-powered oral irrigator with 10 adjustable pressure settings and standard and massage modes. Its 300 ml tank and cordless design suit home use and travel, while customer feedback is mixed on water capacity.

At a glance

Ten pressure levels provide options for adjusting the water stream to personal comfort.
Standard and massage modes offer two stated cleaning choices.
The listed 300 ml reservoir may reduce the need to refill during a cleaning session, though customer feedback on capacity is mixed.
Cordless battery power and a travel-oriented design are presented as convenient for use away from home.

Price

$44.98Save 10%

Reference price: ~~$49.99~~

Price checked: Nov 12, 2026

View offer

Often bought together

COSLUS E40 Water Portable Teeth Flosser, 10 Precise Pressure Settings Black | Advanced Electric Flosser for Tooth Cleaning, M

$44.49

Pros and cons

Pros

Pressure adjustment offers a range of settings rather than a single fixed intensity.
The 300 ml tank provides a substantial stated reservoir for a portable flosser.
Customer feedback describes the device as easy to use, with useful cleaning performance and long-lasting charge.

Technical specifications

14 specifications

Identity
Brand	COSLUS
Model	E40
Colour	Deep Black
Target area	Teeth
Product benefits	Deep Cleansing, Gentle Cleaning, Irrigators
Special features	Multiple Operation Modes, Multiple Pressure Settings, Multiple Tips, Non-Slip Grip, Portable

Cleaning and water
Pressure settings	10 adjustable pressure levels
Cleaning modes	standard mode and massage mode
Tank volume	300 ml
Material	Plastic

Power and battery
Power configuration	Battery Powered
Battery	1 Lithium Polymer batteries required. (included)

Dimensions and compliance
Dimensions listed	23.8 x 8.5 x 6 centimetres
Specification met	FCC

What to know before buying

Listing details to confirm

The listing describes a 30-day battery life and fast USB charging, but provides no test conditions or usage pattern for the battery estimate. The adapter is stated to be excluded, and the charging port or cable details are not specified. The listing also uses both stepless control and 10 pressure levels, and gives differing warranty terms of one and two years. Customer opinions on tank capacity are mixed, so the 300 ml figure does not establish that every user can complete a session without refilling.

Who is it for?

A good fit for

Travellers wanting a cordless water flosser with a stated 300 ml tank.
Buyers who want to adjust water pressure across multiple levels.
People looking for separate standard and massage cleaning modes.

Less suited to

Buyers who require a clearly specified charging adapter in the box.
Anyone who needs confirmed warranty duration or a substantiated battery-life estimate before purchase.

COSLUS E40 Cordless Water Flosser, 10 Pressure Settings · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 5,823 ratings

5 stars69%69%
4 stars15%15%
3 stars7%7%
2 stars3%3%
1 star6%6%

Customer feedback reports positive impressions of ease of use, cleaning performance, pressure and battery life. Buyers seeking fewer charging interruptions may value those reports, while opinions on water capacity are mixed. The overall rating distribution is mostly positive but includes a meaningful range of lower ratings, and ratings alone do not explain their causes.