The camelbak podium big chill bottle is the biggest out of the podium range with a capacity of 750ml it will keep your drinks cold twice as long as regular sports bottles and it will also keep your warm drinks warm during cooler weather and this is all thanks to the double wall construction the camelbak water bottle has the all important jet valve which gets you hydrated quickly and seals itself up when you arent drinking so that you get virtually no spillage and the easy squeeze bottle lets