McDonald’s recalled all of its Shrek drinking glasses, after it was discovered to contain cadmium. These glasses were sold to promote the fourth installment of the movie Shrek in the United States.

Cadmium is a very dangerous substance, even for tiny inhalations, as this can cause several complications, the most common of which is severe lung disease. This is according to the Agency for Toxic Substances and Disease Registry. The information is posted in their website.

Cadmium is a substance that is useful for plastic, metal coatings and battery manufacturing. This time, apparently, it was used in the 16-ounce glasses for 2 dollars apiece.

This recall does not include or affect McDonald’s branches in the United Kingdom. This is according to the office of the British press as stated via email. This promotion is also not run in Asia. This is according to the office of McDonald’s in China.

Hopefully, no damage has been done yet among the customers who have bought the product before it was recalled. Many things can be learned here, and hopefully new safety measures will be implemented, as this is not only a drawback in terms of financial and economical concerns, a more important variable with regards to the health of McDonald’s customers is at risk.