Just bite sip and go the camelbak big bite valve 4 colour multipack is a must have for all owners of a camelbak reservoir bottle simply replace the current bite valve and it will be working like brand new the bite valve prevents the water bottle spilling while not in use and is also incredibly easy to clean camelbak big bite valve 4 colour multipack features self seals after each drink to eliminate annoying drips patented one piece silicone design fits all camelbak reservoirs inclu