Contigo Stainless Steel Double Wall Tumbler with Caribineer Clip Patented pull-tab lid makes this mug 100-percent leak-proof Foam technology makes this mug thermally insulated for both hot and cold beverages Patented carabiner clip on the handle allows you to take this mug wherever you go; Attach it to a bag strap for hands-free portability Will hold up to 16-ounce of your favorite beverage and fits most standard car cupholders Textured grips make this bottle easy to carry and hold