Trying to catch the waiter's eye to refill your glass could soon be a thing of the past.
Researchers at Mitsubishi in the US have created a glass that senses when it is getting empty and sends a message to a bleeper telling the waiter to come and give you another drink.
Paul Dietz, a researcher at Mitsubishi Electric Research Labs in Cambridge, Massachusetts, said that the glass is part of a wider pilot project to introduce more automation into restaurants.
He explained that the cost of creating the glass, which contains a radio frequency tag like those used for retail security, was "about the price of a can of Coke.
"I've used an off-the-shelf microprocessor costing 50 cents, but I could have used the 20 cent version."
The lab is now trying to persuade its parent company to turn the idea into a commercial product. "It's what we're hoping," said Dietz.
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