 If you use these to floss, your dentist probably hates you. Floss picks are just moving bacteria back and forth between different parts of your mouth, causing bad breath and cavities. Traditional floss can be curved at an angle to clean around your teeth and below the gumline. Picks can't. Water picks are also no good. They can't remove the film and plaque on your teeth. Plus, size matters. You should be using 15 to 18 inches of floss, not 1 inch. Forcing that tiny piece of floss between your teeth can lead to fraying and shredded floss can hold more bacteria. Sure, if you have a piece of spinach in your teeth while at dinner, grab the floss pick. But don't make it your flossing routine. Your teeth and the environment will thank you.