COSLUS C20 (also known as F5020E) is a popular portable cordless water flosser/oral irrigator.
Key Features
- Large 300ml water tank — Significantly bigger than many competitors (often ~50% larger than standard portable models). This allows for ~60-90 seconds of continuous use without refilling.
- Cordless & rechargeable — USB charging with a long-lasting battery (up to 30 days on a single charge with typical use).
- IPX7 waterproof — Fully submersible, suitable for shower use.
- Modes — Typically 3 modes: Soft (for beginners/sensitive gums), Standard/Clean, and Deep/Pulse. Some mention dual-stream technology for enhanced cleaning power (1,400–1,800 pulses per minute).
- Tips included — Usually 5 tips: standard jet tips, orthodontic tip, periodontal/pocket tip, and tongue scraper.
- Portable design — Compact for travel, with colors including Black (as in your query), White, Pink, etc.
- Other claims — Removes up to 99.9% of plaque, helps reduce gingivitis/bleeding gums, effective for braces, implants, crowns.
ADA Acceptance
Many Amazon listings title it as “ADA Accepted” and claim healthier gums in 15 days. However, some independent reviews note it does not currently carry the official ADA Seal of Acceptance (as of recent checks). This discrepancy may stem from marketing language vs. the formal Seal program. It performs well in plaque removal according to user and reviewer feedback, but those needing certified devices for advanced gum issues should verify directly or consult a dentist.
Pricing & Availability
- Official site (coslus.com): Around $36–$45 (often ~$45 regular price).
- Amazon/Target: Frequently on sale in the $25–$40 range, with strong sales volume (tens of thousands bought monthly). Check current deals as prices fluctuate.
Pros (from reviews)
- Excellent tank size reduces interruptions.
- Strong battery life and waterproofing make it travel-friendly.
- Good value compared to premium brands like Waterpik.
- Effective cleaning with multiple tips.
Cons (mentioned in reviews)
- Handle can feel slippery when wet.
- Button may get sticky over time for some users.
- Bulkier due to the large tank (may not suit very small hands).
