LEAK PROOF - Smart two-piece valve prevents spillages (but can be removed for drinking freely) Bite Resistant - The durable one-piece spout is gentle on small mouths but strong enough to withstand small teeth DOUBLE WALL INSULATION - Helps keep drinks cool to encourage them to ...LEAK PROOF - Smart two-piece valve prevents spillages (but can be removed for drinking freely) Bite Resistant - The durable one-piece spout is gentle on small mouths but strong enough to withstand small teeth DOUBLE WALL INSULATION - Helps keep drinks cool to encourage them to stay hydrated while they play, learn and explore, from 12 months and up EASY TO HOLD - Carry handle for easy grip for little hands, lift and sip (for less mess and less stress) EASY TO CLEAN - All parts are dishwasher safe | BPA free