Washington, June 4 (IANS) US fast-food giant McDonald’s is recalling its 12 million glasses, sold as part of a promotional tie-up with the ‘Shrek’ movie, because they contain toxic metal.

The glasses, which were sold for about $2 since the beginning of May, contain cadmium, which can cause health risks with long-term exposure, the US Consumer Product Safety Commission (CPSC) said Friday.

The glasses were manufactured by ARC International, of Millville, New Jersy.

No injuries have been reported, but McDonald’s has asked consumers to stop using the glasses and return them for a full refund, The Wall Street Journal reported.

McDonald’s said the glasses met federal standards when tested by an independent third-party laboratory, but decided to recall the items ‘in light of the CPSC’s evolving assessment of standards for cadmium in consumer products’.

The voluntary recall by McDonald’s, which is known for tough oversight of suppliers, can hurt the fast-food chain’s credibility in the market.

Though, the glasses do not pose an ‘acute risk’ to children, Scott Wolfson, a spokesman for the CSPC said, as the amount of cadmium in them is slightly above the normal standard.