I have a couple of options for water. When backpacking I normally use collapsible Nalgene bottles, primarily for weight. I'm not a big fan of the Camelbak style bladders just do to pulling them in/out of a full pack can be a pain while on the trail. I did find some Nalgene replacement lids that have a Camelbak style drinking tube. They seem to work really well and have been quite pleased. Klean Kanteen makes some great products as well and I will usually use one of those will packing in some bourbon as they seal really well and the stainless steel doesn't affect the taste IMO.