if you are going to use regular disposable water bottles, dont use the new ones that have 33% less plastic. then they have problems. but i use disposable bottles alot, very light[ wont even measure on most backpacking scales] and will with stand a ton of abuse. i boil water and pour it in them all the time, works great, never, EVER, had a single issue with them not lasting.
BUT the one thing very nice about the nalgene bottle[ which is really the only reason i carry one[ but i dont use a camel back system either] is the measureing on the side. very useful! the mountain house foods are pretty important to use the correct amount of water.[ and i really do enjoy drinking out of a wide mouth bottle better than the others..]
it goes to show that every backpacker uses something a little different?
wade: as far as 36 lbs, how many days would that be for? my 7-8 day pack will always be between 36-38 lbs. is that similer or should i still be cutting weight? when i finally find a lighter pack that i like, and i'm pretty picky, i do believe i can shed a couple pounds in the pack alone. but, although a little heavy, i do love my backpack