You ll flip over our Mighty Grip cup. Your toddler will grasp the contoured shape advantage immediately. Flip the lever up to put the straw in perfect sipping position and to close it securely. Whatever position the straw is in youll never see a leak or have to wipe up a mess. This cup is a mighty big idea that s making kids and moms flip. Each cup holds 10 oz. of liquid. Cleanup is a snap top rack dishwasher safe. Ideal for kids 12+ months. You ll flip over our Mighty Grip cups. Your toddler will grasp the contoured shape advantage immediately. Flip the lever up to put the straw in perfect sipping position and to close it securely. Whatever position the straw is in you ll never see a leak or have to wipe up a mess. This cup is a mighty big idea thats making kids and moms flip.