Combine the ease of folding your car shades with the durability of a water- tight canvas bag and you have the Pop-Up Tub from DOOG. It takes a few seconds to unfold with no bars or tools necessary. Just twist to pop open and it’s ready for a cool down pool or bathing tub. It only takes a minute or two to dry by hand, then twist to collapse back to its original easy-to-store shape. Available in three sizes.