Originally Posted by
bmike
starting to border on not ultralight, but i have had need to keep water from freezing on long day rides in the shoulder season and in the middle of winter. and planning to do an overnight this year if i can upgrade a few pieces of gear...
these will fit into anything cages (which are great, BTW, if you don't overload them) on the pugsley or the fargo. pugsley if we get good snow, fargo if its cold and icy and i run studs.
Granite Gear bottle snugglies by
mbeganyi, on Flickr\
granite gear aquasack - fit a nalgene into a sleeve with some bubble insulation. might not be workable below 0dF, but should work in the mid teens to 30s. will probably have to get something like the aquatherm or move to the outdoor research water bottle parka.
Have you not considered the battery powered heated socks for this sort of thing? Even the chemical hand warmers might be workable.
I might consider either alternative if touring in really cold weather, lightweight or not. I remember several trips in Tasmania and Victoria in conditions such that my water bottles, left outside on the bike, were frozen solid and took three hours to melt enough to drink from. Which can be a real PITA, because you can't empty and refill them, and I didn't have access to other bottles at the time. And yes, experience has told me now to bring them into the tent...