Beer mat radios for help when empty

First gadgets led thy astray from those sweet watery suds and now bringeth thy back. Two Germans by the names of Schmitz and Butz (te he) have created a Philip Morris beer coaster with integrated pressure sensor and radio transmitter to signal bar staff when your beer is almost empty. Presumably, this is just the first step to replace all bar staff with robots so that we can once again suck down those glorious plumes of tasty arsenic and copper-laden red packs with impunity.