Disney Planes Insulated 9 oz. Sippy Cups (2-pack) feature double-layer insulation to keep liquids cold for longer, and an easy to clean One Piece Lid. Kids love the colorful and bright artwork of the cup, and parents love the innovative design. The double layer makes the cup sweat-proof for a better grip. And to make life even easier, all of The First Years Insulated Cups have interchangeable lids. This means you can mix and match lids, even with the straw cups!