Just curious what most folks do for drinking water on a weekend hunt. I start out with bottled water unless I'm going a few miles in ... then I use what mother nature provides. My question has to do with 'purification' ... it's not always easy to boil water (especially if you're on the move). There's some really good water bottles with filters on the market. What brand of water bottles or filtration system do you use to keep the weight at a minimum? I'd like to know who makes the best water filter (light weight system) these days.