COPCO/WILTON-Double Wall Tumbler. The classic to-go cup has become a reusable everyday cup! Simply fill; drink; wash; and repeat. The lid locks and seals to prevent spills and the included straw keeps your drink perfectly mixed. It has a double-wall construction where the outer wall is clear and the inner wall gives a bright burst of color. This package contains one 24-ounce reusable cup with lid and straw. Available in several colors (each sold separately). Dishwasher safe. Imported.