For a do-it-yourself camelbak dryer, I have stretched out a metal coat hanger and stick it in my camelbak (really a camelbak knock off) with the hook side down and hang it up, using another coat hanger, so the inside dries out. Works great. I also wash it out with dishwashing liquid. I find I drink a lot more when I have my camelbak on. The weight doesn't bother me, and it gets light pretty quickly anyway as I drink.