The only thing I hate more than filtering water: the taste of iodine. That's why Vapur's latest water bottle, to be released in April 2013, is so sweet. Built into the lid of their latest one-liter bag is a SureAqua filter. All you have to do is dip into a creek, close the lid, and drink. It'll filter 500 liters of water over its lifespan, weighs a third as much as a Nalgene, and comes with a spare bag and filter.