CamelBak: FEATURESBIG BITE™ VALVEEasy Bite And Sip Valve Self-Seals After Each DrinkLEAK-PROOFOn/Off Lever.Water When You Want It, None When You Don'tLARGE MOUTH OPENINGAllows 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 LOOPHang Flask Upside Down From Loop For Easy Drainage And DryingPACKABLEEmpty Flask Collapses And Folds Ultra-Compact To Fit In Most PocketsDISHWASHER SAFEHand Wash Vessel, Cap Is Top Rack