New spout design is secure and easy to use, making it even more kid friendly Pop-up straw features a 100% spill-proof valve that prevents spills even when spout is open Easy-Clean Lid is designed to eliminate nooks and crannies where dirt and grime could get trapped BPA-free plastic lid and body are top-rack dishwasher-safe for easy cleanups Straw is a cinch to disassemble for thorough cleaning but stays tethered so there are no loose parts to misplace