This 20 oz. BPA free double wall, vacuum insulated 18/8 pro-grade stainless steel tumbler is perfect for holding your warm holiday beverages that stay hot or cold for up to 8 hours while not burning or chilling your hands. The Avec Nature tumbler is an ideal gift for your loved ones, even being a group set for the family. There are four awesome colors to choose from: black, navy, burgundy, and white. The shape is designed to be easy to hold and drink from, as well as being leak free. We use a press on slide lock opening for the tumbler that slides open and closed to prevent spillage.