Moldy coffee cups: a celebration of penicillin

In commemoration of the 75th anniversary of the discovery of penicillin -- a happy accident in which rogue mold grew in a forgotten petri dish -- the Royal Society of Chemistry has asked its most unhygienic stakeholders to send in photos of their most disgusting, molded-over and crufted-up coffee cups. Stomach-turning goodness! Link (Thanks, Malcolm!)