Tupperware Sandwich Keeper and Tumbler with Flip Top Seal Pink Tumbler: One 16-oz. tumbler with flip-top seal. Ideal size for single-serving drink-mix packets of a childs favorite beverage  less wasteful than disposable bottles or boxed drinks. Sandwich Keeper: One slim, one-piece, hinged design fits easily into a backpack. Also great for small toys or other items.