Coslus wants to fix the biggest problem with water flossers and the E40 might actually do it

The world of water flossing has largely been stuck in a cycle of “good enough” engineering for years. If you have ever used one, you know the drill: you fill the tank, stick the nozzle in your mouth, and brace yourself. You hit the power button and usually have to choose between a “Gentle” mode […]

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