Is there a minimum purchase amount required to buy the McDonald’s x tokidoki Charm?

The McDonald’s x tokidoki Charm is available for purchase at $7.90 per charm with every purchase of a 6pc or 9pc Chicken McNuggets® Meal, Upsized Meal, Feast or 20pc Chicken McNuggets® Ala Carte (Non-Spicy, Spicy and Mix).