Normally when hiking or backpacking, my primary mode of carrying water is a bladder and hose in my pack. However, this system obviously doesn't work very well in the winter (where even the insulated CamelBak hoses freeze within a few minutes). My solution for this thus far has been to put very warm water in my bladder before setting out, but pee warm water is not very refreshing when hiking, and this is a temporary solution at best.
As a result, I've been looking at getting some sort of insulated garment to wear while hiking that has water bottle pockets on the inside to keep my water from freezing. Normally my winter night hikes or backpacks are at temperatures of about 0-20 degrees F, so it's still way too warm to go hiking around in a belay parka or down jacket, which are the garments that commonly have these pockets.
Hence my question: Does anyone know of any lightly insulating jackets (200 weight fleece or the equivilent) with a full front zip and internal water bottle pockets? Something that is fairly warm, but breathable enough to wear while working up a sweat? Or am I overlooking a better / simpler solution? I've done some searching but come up empty. Thanks.

