I have a set of 10 unused Coca- Cola drink coasters are made out of thick cardboard. On the top is a question in German and the back has the answer. These were from the 1970-80s and are a great vintage item at a great price. Use your knowledge or translator to gain some knowledge ! Example Was Sieht man im dunkeln am bestern? What is best seen in the dark. You know the answer ! Licht !! A couple extra will be thrown in too.