IGN's commerce team has flagged a deal in which Amazon is selling the Coslus C20 Cordless Rechargeable Water Flosser for just $6.99, provided shoppers apply the coupon code "BQ385MEV" at checkout. That represents roughly 83% off the $42 list price, is described as the lowest price the writer has seen, and does not require an Amazon Prime membership. The device is billed as Amazon's number one best-selling flosser, with over 51,000 user reviews.

The C20 is a cordless oral irrigator that cleans teeth with a jet of water rather than string, and it offers three pressure settings along with a couple of interchangeable nozzle tips. Its fully integrated design holds a 300ml water tank, takes up little countertop space, is travel-friendly, and advertises up to 30 days of daily use per charge via the included USB Type-A cable; it also reportedly gained the ADA Seal of Acceptance in June. The reviewer, who bought one himself, notes that while it is not as powerful as his $100 Waterpik Aquarius (roughly level 7–8 out of 10), cannot be tilted upside down and has a bulkier handle, its strength is adequate for daily flossing and he considers it well worth $7.