What are you using? I'm in the market for one due to the old kidney stone scare. I'll pick up a bicycle one before I leave on Wed, but I'm still researching on the web for something suitable. Most of the ones I see are for cyclists with add on pockets / storage space. I personally dont want any of the add-ones, just a nice compact strap on water carrier basically. 2 litre capacity should be about right. Iâ€™ve narrowed my selections down to three 1. Camelbak Classic http://www.camelbak.com/sports-recreati ... assic.aspx 2. Deuter HYdro Lite 2.0 http://www.deuterusa.com/products/produ ... tert=hydro 3. High Sierra Wave 70 http://www.highsierrasport.com/Item?num ... 01&lang=en Which one would get your vote, or what else would you suggest?