These particular Charka cups are custom handcrafted by an artist from Siberia (Russia) from birch wood and treated with beeswax and oil.
Today, a traditional charka is difficult to find outside Siberia or northern Scandinavia, partly because burls are seldom harvested in modern mechanized forestry. With the introduction of glass, ceramic and metal drinkingware, the skill of making a suchartwork has become a pastime skill rather than the essential one as it was in the past. Nowadays it is also used for bushcraft. When used this way, it is carved by the person who is going to use it, or it's a gift from a friend.