A dangerous metal called cadmium has been discovered in 'Shrek'-themed drinking glasses being sold at McDonald's restaurants across the country, prompting the fast-food giant to recall 12 million of the collectors items. The 16-ounce glasses have been going for $2 a pop, and with the success of 'Shrek Forever After' at the box office, they've been a hot item since their May 21 debut. The glasses have been available in four designs -- Shrek, Fiona, Puss in Boots and Donkey.

McDonald's announced Friday morning that it would post instructions on its website next week about refunds. Until then, they say to STOP using the glasses.

Shrek Glass Recall from McDonald's