The Camelbak Antidote is more than just a revised Omega reservoir the Antidote is a premium performance system connecting you to the hydration you need. Seamlessly integrated into their specialized packs with quick connect enhancements & unparalleled stability the Antidote is light low-profile & perfectly equipped for any dose of adventure.&8226; Air-Light fill port &8211; the widest on the market so easy to hold&8226; Quick-Snap cap &8211; only 1/5 turn from closed to open requiring very little effort&8226; Low profile fit with internal baffle (2.0L & 3.0L only )&8226;RF welded trilaminate polyurethane reservoir film for incredible strength & burst resistance&8226; Hydroguard anti microbial protection&8226; Kink resistant Pureflow tubing with a taste free Hydroguard protected liner&8226; Quick link system &8211; more than just a quick disconnect Quick Link allows multiple innovations to click into place &8226; Integrated dryer arms