1 / 7COSLUS C51 Cordless Water Flosser, 300 ml
The COSLUS C51 water flosser is a battery-powered cordless irrigator with a claimed 300 ml tank, three modes and six pressure settings. Its adjustable setup and compact, nozzle-storing body suit buyers seeking a portable daily-cleaning option, though reported water-pressure experiences are mixed.
At a glance
- Three modes and six pressure settings provide options for adjusting the cleaning feel.
- The claimed 300 ml tank is designed for a complete cleaning session without refilling.
- Built-in storage is claimed for two nozzles, useful for packing without a separate case.
- The listing describes a press-to-clean Jet mode intended to help control splashing.
Reference price: £23.59
Price checked: 12 Nov 2026
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Pros and cons
Pros
- Cordless battery power and built-in nozzle storage support travel use.
- Multiple modes and pressure settings allow users to begin gently and adjust.
- The 300 ml tank and wide opening are presented as convenient for filling and routine use.
Cons
- Customer feedback reports mixed experiences with water pressure, including reports of pressure loss over time.
Technical specifications
12 specifications| Brand | COSLUS |
|---|---|
| Model | C51 |
| Power configuration | Battery Powered |
|---|
| Dimensions listed | 31 x 6.9 x 5.5 centimetres |
|---|---|
| Weight listed | 270 Grams |
| Modes | 3 modes |
|---|---|
| Pressure settings | 6 pressure settings |
| Tank volume | 300 Millilitres |
| Pressure range listed | 20- 130 PSl |
| Colour | Black & Dark Tank |
|---|---|
| Material | Polycarbonate |
| Nozzle storage | Stores two nozzles securely inside its compact body |
What to know before buying
Listing details to confirm
The listing describes three modes and six pressure settings, but a separate feature claim calls these 18 tailored options. The pressure range is printed as “20- 130 PSl”, so its unit notation is unclear. Treat these as listing details rather than independently confirmed specifications. The listing also gives two slightly different dimension figures, so the technical table uses the designated dimensions field.
Who is it for?
A good fit for
- Travellers wanting a cordless flosser with internal nozzle storage.
- Users who prefer adjustable modes and pressure settings for routine oral cleaning.
- Buyers seeking a water flosser with a claimed 300 ml tank.
Less suited to
- Buyers who need a clearly confirmed pressure specification or consistent pressure performance based on the available feedback.
Customer reviews on Amazon
- 5 stars
70% 70% - 4 stars
18% 18% - 3 stars
5% 5% - 2 stars
2% 2% - 1 star
5% 5%
Customer feedback highlights perceived cleaning performance, adjustable settings, battery life and tank capacity. Some customers report good pressure control, while others say pressure can decline over time. That mixed feedback matters for buyers relying on consistent jet strength, particularly because the listing’s pressure-range notation is unclear. The aggregate ratings lean positive overall, but ratings alone cannot establish pressure reliability for an individual unit.
Positive themes
- Customers report appreciating cleaning performance, adjustable settings, battery life and tank capacity.
Mixed feedback
- Feedback on water pressure is mixed, with some praising the settings and others reporting pressure loss over time.
Frequently asked questions
How many modes and pressure settings does the C51 have?
The title and feature text describe three modes and six pressure settings. Another feature claim refers to 18 tailored options, so the combined mode-and-setting count is not stated consistently.
How large is the water tank?
The listing specifies a 300 Millilitres tank and says it is designed for a complete cleaning session without a refill.
Is it suitable for travel?
The product is described as cordless and compact, with storage for two nozzles inside the body. No runtime or charging specification is provided here.
What pressure range is listed?
A listing FAQ gives “20- 130 PSl”. Its unit notation is unclear in the supplied listing, so do not treat it as a confirmed pressure specification.
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