Guksi, a sami word for a traditionally carved cup in wood, from Torne Valley in Swedish Lapland. Made from birch wood. Holds 150 ml.
Bring it on the mountain hike, hang it in your belt and bring it out at the mountain stream and fill it with fresh water or why not with newcooked coffee at the campfire.
The cup should only be rinsed off with lukewarm water. Do NOT use detergent, as it may damage the product. Hand wash only.