Millions of the shocking coasters are being distributed to German clubs and pubs to remind youngsters how their night could end.
Germany is facing a teen binge drinking epidemic fuelled by all-you-can-drink parties where youngsters pay an entry fee and then drink until they drop.
One coaster has a picture of a teenage boy, dancing at a party and showing off his muscles to the girls then on the flip side he is passed out after wetting himself.
Another beermat shows a girl laughing with friends while the reverse shows her passed out on a picnic table in her underwear.
And one shows football fans enjoying a match on one side, but a fan asleep and covered in his own vomit on the reverse.