My wife and I went for a drive today. Stopped in at REI and bought a 2 liter Hydropak water container for hiking and we both got a Clean Canteen insulated metal water container. The hydropak can go inside the pack or tie onto the outside. It's a soft container so you can fold it up when not in use. Hydropak also makes water bladders that are reversible and they look real nice. My problem with that is when I am working at Pinnacles I stuff 4 water bottles in the bladder compartment to give to hikers when I find them in the High Peaks and without water. So there is not any room for the bladder. However when on a photo hike that area would be available so I may add a Hydropak bladder to my kit if I decide I want to. The good news is from now on I am going to be sipping nice ice water out there. That will be nice. Couple shots from the cliffs in Carmel Calif.