It's one of the marks of a classy restaurant that the waiter turns up and discreetly refills your glass the moment you empty it. Now a Japanese electronics company has found a way to guarantee that kind of service―and you don't have to catch anyone's eye. Developed by Paul Dietz and a team at the Mitsubishi Electric Research Laboratories (MERL) in Cambridge, Massachusetts, the iGlassware system signals staff when you're ready for a refill. It uses an adaptation of the radio frequency identification (RFID) tag technology that's used to stop people stealing goods from shops.
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