I made a leather costrel over the course of a few weeks. It involved shaping the leather wet over a form and then letting it dry, sewing it together and hardening it with beeswax. The lanyard is braided with strands of jute that were first twisted into cords. The bung is carved from maple and all together the capacity is about a liter or about a quart. The water has stained the beeswax finish (it is not dyed) but that does not affect its function.