I am making a 72 hour bag and had a couple questions for you guys concerning this. I have looked around and get VERY different answers for whether to use water purification tablets and water bottle with filter, or just the water bottle with filter and plan on boiling my water after filtering. It seems that the problem with purification tablets are that they have a short shelf life (2-4 years) and I know with my memory I don't want to count on being able to remember to change out my purification tablets. So what's your guys opinion on this situation? I think I'm going to go with Water Filter Bottles and getting a container to boil the water as well. Now for my questions: Is my strategy the right way to go? What bottle (with filter) would you recommend to place in my bag? What lightweight container should I bring to boil water? Thanks to all in advance!