BERLIN (Reuters) - 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.
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.