Adventure Water Bottle is 12-oz water bottle features spill-proof straw that minimizes messy leaks, drips and dribbles. The valve opens the moment your child's lips touch the straw, so it's easy for children who want to do it all themselves. The straw lid opens easily for toddlers, while grown-ups will have no trouble separating the two-part hinged cap for a thorough cleaning. The hourglass shape fits just right in little hands. The flexible handle hooks quickly onto diaper bags, backpacks and etc.