Running water can be extremely scarce above the snow line. About 1 litre of water should be carried as a minimum. Leave your bottle of water in your pack or tent overnight to avoid freezing. When collecting snow for water, always collect fresh-looking snow, well away from huts. Ice crystals and icy snow contain more water than an equivalent volume of powder snow. Always add snow each time you drink, as some water remaining in the bottle will thaw the snow more quickly. It is not recommended to eat snow directly, as the energy required for your body to melt it results in heat loss.