When we saw these for the first time we instantly knew how useful they would be. Resolution caps cover all the openings on your pipe so you can clean it aggressively without slinging cleaning solution all over your house. Fill it up, cap it off, and shake it up. You can also use these pipe caps while your piece is stored to prevent smells and water leaking from it. A box comes with three of them that are standard sized but will also stretch to fit just about any piece out there.