Hasta La Ideas

Unless you have experience with traditional boatbuilding or making traditional Japanese sake cups, you may not realize you can join two pieces of wood together–with no glue or sealant–in such a way as to make the joint watertight. Here master woodworker Frank Klausz reveals the trick taught to him by his grandfather, fabricating a helpful tool out of materials you probably have lying around:

It is indeed a clever technique, exploiting the behavior of both wood and water, and this is the first time I’ve seen it demonstrated.