COPCO/WILTON-Sierra 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; the included straw keeps your drink perfectly mixed; and the textured non-slip grip keeps it safely in your hand. This package contains one 24-ounce reusable cup with lid and straw. Available in several grip colors (each sold separately). Dishwasher safe. Imported.