Easy-Clean Lid is designed to eliminate nooks and crannies where dirt and grime could get trapped Pop-up straw features a spill-proof valve that prevents spills even when spout is open 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 Kids enjoy an easy one-handed drinking experience at the push of a button For ages 3 and up