"Is the bowl half-full or half-empty?" - balance, the most original drinking bowl of Carl Mertens gives a new answer to this question: It inclines to both. The less it is filled, the more it inclines to one side.
The more it is filled up, it balances out - the "sensitive drinking bowl" reacts to its content. It shows the different nuances between empty and full and corresponds with its user in a humorous way.