I'm wondering if folks on the forum can share their recommendations for filter water bottles. This time of year it's hot and when wade fishing I usually take two bottles of water in my vest and it's usually not enough. I'd rather not lug around the extra weight, and the water quickly becomes warm. I'd like to find a water bottle with a filter that would allow me to drink out of the river. Last year I bought a katadyn bottle at REI before going into the Bob Marshall Wilderness for a week. Stupid me, I didn't thoroughly test it first and I didn't read all the reviews. It took way too much effort to suck the water up thru the filter. I took it back to REI when I got back and was told it was a common complaint. (The river was crystal clear.) What's your experience and recommendation. I'm going back to the Bob in two weeks.