COSLUS deals
COSLUS makes low-cost personal care electronics, best known for cordless water flossers and facial cleansers sold on Amazon. The brand's flossers are priced well under Waterpik models and use USB charging rather than a wall outlet. This page covers three COSLUS flossers — the CX30, the ADA Accepted C20 and the C30 — with no active deals right now.
Prices at every store and price history for COSLUS products.
COSLUS products: prices and price history
Questions and answers
- Does COSLUS make good water flossers?
- They are a budget pick, not a Waterpik replacement. Reviewers consistently praise the price and the cordless USB-C charging; the common complaints are weaker pressure than countertop units and tanks that need refilling mid-clean. The C20 is the one to look at first because it carries the ADA Seal of Acceptance.
- When does COSLUS go on sale?
- Discounts cluster around Amazon Prime Day in July and Black Friday in November, plus occasional coupon clipping on the listing itself. Outside those windows the price is fairly stable, so waiting rarely saves much on a $30–$40 flosser.
- Where is COSLUS cheapest?
- Amazon, almost always. COSLUS sells direct there and the listings carry the widest model range; Walmart and third-party marketplaces stock fewer SKUs and match or exceed Amazon pricing. Check the COSLUS storefront on Amazon for multi-packs, which lower the per-unit cost.
- What is the difference between the CX30, C20 and C30?
- The C20 is the ADA-accepted model, so it has verified safety and efficacy claims behind it. The CX30 and C30 are later cordless picks with similar form factors; the CX30 is the more compact travel-oriented unit. All three are portable, USB-rechargeable and use a refillable reservoir.
- What is COSLUS's return policy?
- Returns go through the retailer, not COSLUS directly. On Amazon that means the standard 30-day window, and COSLUS honors a 12-month warranty on most flossers if you contact support with your order number. Keep the box for the first month.