Hi-tech beermats for 21st Century (30 Sep 2005)
Because the mat can also sense being picked up and flapped around, customers can signal an order - with the urgency judged by the speed it is moved.
Another feature is that drinkers can say how many drinks they would like to order by stacking of a number of mats in one hand.
Article URL: http://news.bbc.co.uk/1/hi/technology/4298344.stm
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