Contigo AutoSeal Kids Children Leak Proof 9oz Travel Cup Mug - Blue/Green Patented AUTOSEAL lid is 100% leak-proof and 100% spill-proof. Lid is also one piece, meaning no loose parts. Drinking made easy! Press to sip. Release to seal. AUTOSEAL automatically seals between sips to ensure no spills. Contoured body makes this mug easy to hold for smaller hands. Non-skid bottom pad helps keep the mug in place. Will hold 9 oz. of your child's favorite beverage