When a cardboard cup is flattened at its upper edge, a spout is formed which allows the water to be drained more selectively than the original circular shape of the cup rim allows this. Clemens Auer has cast this observation into his water carafe. The carafe provides a secure hold without any troughs, handles and cantilevered edges for one liter of water, can be easily filled, poured and cleaned, and can be stored in a standard and upright position.

prototype, 2011-17