Puzzle Mugs

Puzzle mugs were first made by the Greeks in the second century BC.

Tavern joke jugs were very popular during the 17th to early 19th centuries in Europe.

The puzzle is to figure which holes to cover, the obvious, the hidden and which holes to sip from.

By simply holding this mug comfortably in the correct hand and sipping from the right hole, any brew could be enjoyed without spilling.

Here's an excellent video on how to construct a puzzle mug: http://www.dump.com/puzzlejug/

Wouldn't recommend it for drinking anything that has milk in it, though.  Wine and Beer are sorta self sanitizing. Tea is okay too--no milk. Iced tea with cubes floating around inside the mug would make it even more mysterious.