In The Princess Bride, the Man in Black challenged the kidnapper Vizzini to the ultimate battle of wits: one glass poisoned with odorless, tasteless iocane powder, and the other safe to drink. With no way to tell which one had been poisoned, Vizzini would have to outwit the Man in Black, choose the safe glass, and survive. Of course, we all know that the trick is to have built up an immunity to iocane powder and poison both glasses... but if you want to warn your enemies of your cunning plans, you can always serve the poisoned beverage up in this pint glass, which has a handy warning label: contents may contain iocane powder. 16 ounce glass is made in the USA.