Camelbak Crux reservoirs offer exceptional efficiency and ease of use. With an improved, ergonomic shape, easy refills and 20% more water per sip than previous models, Camelbak Crux reservoirs are the last word in portable hydration units, working superbly with the wide range of compatible, useful packs that CamelBak have designed especially for them. They\'re leak proof, exhaustively tested on cycle trails and free of BPA, BPS and BPD too!Offers 20% more water per sipLeak proof, easy-open capOn/off drinking tube lever for one handed sealingHydroGuard technology inhibits the growth of bacteria in the reservoir and tubeBig bite valve self-seals after each drink, eliminating drips