COSLUS C20 Cordless Water Flosser

Brand: COSLUS Water Dental Flosser

A pocket sized rechargeable flosser with a 300 ml tank, quoted at 1,800 pulses per minute and IPX7 sealing. COSLUS claims up to 30 days of use from a three hour charge, which is plausible for one short session a day. The handle is short and light, several tips are included, and the whole thing costs a fraction of a countertop unit, model code F5020E.

A fair first purchase for a teenager who has just had brackets fitted and may or may not stick with the habit, or a spare kept in a gym bag. Expect compromises: pressure steps are coarse, the tank is small even by cordless standards and long term durability is unproven next to Waterpik or Philips. There is no ADA Seal and no tapered orthodontic brush tip in the standard box.