BERLIN Fans of non-stop drinking may soon be able to cut down on time wasted ordering refills, thanks to a beer coaster that can tell when a glass is empty.
The coaster, fitted with sensors, measures the weight of the beer and sends a signal behind the bar when it's time for a refill. Anxious drinkers can also attract the attention of staff by waving the plastic mat, thanks to a motion sensor. It was invented by students Matthias Hahnen and Robert Doerr for a project at the University of Saarbruecken in southwest Germany.
The device has attracted the attention of beer vendors in North America, including a leading Canadian brewer, according to Michael Schmitz, one of the supervisors of the project.
"They wanted to know if they could use it or make it themselves," he said. "
The prototype cost about 84 euros to make one but if mass produced, it could be done for around 10 euros."
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