] Since restaurants often make much of their profits on
] drinks, it is critical for servers to offer refills in a
] timely fashion. We propose wireless liquid level sensing
] glassware to aid in this task. Specially instrumented
] glassware detects fluid levels via a high-resolution
] capacitance measurement. A coil embedded in the table
] inductively couples power to the glasses, and provides a
] path for data exchange. Our prototype glass uses a
] standard microprocessor and a small number of passive
] components, making it extremely inexpensive.

Brilliant. With the time this would save me trying to get some service I could probably drink another pint.

MERL - iGlassware