I used two Platypus one liter bladders in my hammock last weekend. I put about 2/3 to 3/4 of a liter on the stove to boil then add it back to the bottle to make it hot. I don't use a sock or anything, just one at my feet and one under my knees. Man it is nice. Steve
There are only two kinds of people that understand Marines: Marines and the enemy. Everyone else has a second-hand opinion.
Gen. William Thornson, U.S. Army