http://www.cnn.com/2005/TECH/09/30/s...mat/index.html
Quote Originally Posted by CNN
Two German students have created a device that will stop beer lovers having to get out of their seats for a refill.

The "smart" beer mat, created by Matthias Hahnen and Robert Doerr from Saarland University in Saarbruecken, southwest Germany, can sense when a glass is nearly empty, sending an alert to a central computer behind the bar so waiters know there are thirsty customers.
I believe they have just come up with the best invention ever! Me and a friend had thought to improve bar technology with metered taps at the tables, but gave up due to the possible sanitation and legal hurdles. This is the next great step. Cheers to the Germans!!!