I stopped using a blatter sometime ago and have been happy with that decision. The water always tasted "off" to me. And, at least for me, I would roll into camp with the thing half full having passed streams or lakes every half hour/hour or so. That is an awful lot of weight to be carrying all day for no reason. I do use a wide mouth, nalgene like, bottle because they work better with my steripen, but I carry much less water weight.

I always struggle with food. I usually bring way too much and get home scold myself for bringing soo much food up and down a mountain. Plus I am phat (but with an "f"), so it really wouldn't be all that bad if I went a little hugry on a trip.