Cordless water flosser without battery, anywhere and anytime you want. Easily remove debris and food residue from between teeth and below the gumline, deep clean where regular flossing can't reach. Simply twist the tube bottom by counterclockwise to open and fill in water, one-key to clean your teeth and gum. Comfortable beauty SPA result at home or travel. Best gift for friends and family. Pocket size can replace toothbrush and save your space.