FEATURES BIG BITE VALVE Easy Bite And Sip Valve Self-Seals After Each DrinkLEAK-PROOF On/Off Lever.Water When You Want It, None When You Don'tLARGE MOUTH OPENING Allows You To Fill The Flask Easily With Ice And Makes It Easier To CleanHYDROGUARD Antimicrobial Technology Inhibits The Growth Of Bacteria In The FlaskBPA/BPS/BFA FREEEASY DRY HANGER LOOP Hang Flask Upside Down From Loop For Easy Drainage And DryingPACKABLE Empty Flask Collapses And Folds Ultra-Compact To Fit In Most PocketsDISHWASHER SAFE Hand Wash Vessel, Cap Is Top Rack