Easy-Clean Lid: Designed to eliminate areas where dirt and grime could get trapped Pop-up Straw: Features a spill-proof valve that prevents spills even when spout is open Top-Rack Dishwasher Safe: BPA-free plastic lid and body assures easy cleanups Tethered Straw: Easy disassemble for cleaning with no loose parts to misplace One-Handed Drinking Experience: Pop-up straw allows for easy one-handed drinking at the push of a button Ages 3 and Up: Perfect for little ones Spill-Proof Valve: Ensures car seats and tables are safe from spills, even if held upside down.