This is a photo of our water bottle. We have to keep our water bottles inside these insulated covers in order to keep them from freezing while we travel. Each morning we fill up our water bottles and thermoses with boiling water. When we stop for lunch, it isn't un-common for the water inside to already have a thin layer of ice on it. The insulated cover can't keep the water from freezing, but slows down the process.

We have to be very careful to keep our bodies hydrated. When it's cold outside, you are less likely to become thirsty, even though your body needs more water. We try to drink at least three liters of water per day.