I was wondering how many people out there use some form of Hydration Bladder in there packs. I have a Osprey 3L Bladder that I have though of using , with the thought of only filling 2 liters worth , so that the bladder does not "Baloon " out and take up tons of space in my pack. Plus , the aggervation of removing the bladder to refill , is another thought. I like the idea of the bladder , but I still feel as though I need to carry a old Gatoraid bottle for water... What are your thoughts.........