My husband used his Camelbak (actually another brand purchased from Costco for under $25) when we went to
Disneyland for 5 days. It holds 2 liters of water (he drinks around 2 gallons a day) and worked GREAT. I'm thinking of getting smaller versions for the kids as they go through at least 3 16-ounce sport bottles of water in a regular day, let alone walking around in the heat of FL. I don't want to have to pay a fortune for a ton of water if we could just bring those and strap them onto our backs. My hubbie loved having his water at his disposal....and hands free too! He just had to put the end of the tube in his mouth and drink up.
Melanie