When the sun39s beating down on you there39s nothing better than knowing the contents of your bottle is nice and cool the camelbak podium big chill uses a double wall construction to keep your fluids cold for twice as long as a regular bottle the innovative self sealing jet valve prevents any fluid escaping on the bike but allows you to drink quickly and easily without the need to open any kind of lid or valve the positive lockout cap is easy to activate with a quick twist and prevents