I spend most of my free time dayhiking in the North Cascades, and am not using water for cooking. Sometimes I carry a couple Nalgenes and use a Steripen for quick, cold fill-ups, but most of the time I carry a 3 liter Platty bladder so I don’t have to mess around with water issues. Even in the summer, I usually have about a cup of water left at the end of a long hike. That said, it sure is nice to draw water from an icy cold, high mountain spring.