Contigo AUTOSEAL Stainless Steel Water Bottle - 28 oz. - Blue Patented autoseal lid is 100-percent leak-proof and 100-percent spill-proof Drinking made easy; Press to sip; Release to seal; autoseal automatically seals between sips to ensure no spills 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 Patented lid technology optimizes flow control to make the bottle easy to drink from