“Can’t seem to remember to rinse out your coffee mug? You’ll appreciate this.

Britain’s Royal Society of Chemistry is looking for the most spectacular–or, depending on how you view such things, disgusting–growth of mold to be found in an unwashed coffee mug.

The prize? An evening of, ah, culture.

The contest is meant to mark the British discovery of penicillin 75 years ago. Photos only are being accepted, not actual mugs.

Sorry, but the contest is limited to Britain.” Chicago Sun-Times