Urban Oasis® Wide Mouth Straw Lid makes it easy to flip up and drink your favorite drink. Featuring a flip up straw opening and a ball valve stopper to plug the opening which prevents spills when not in use. Made to keep the temperature of your drink cool or hot all day long. The flip up straw lid is BPA free, recyclable, reusable, non-leaching and will not retain tastes or odor. Fits 16 oz and 18 oz wide mouth vacuum insulated drinking containers.