How to return your Shrek Forever After glasses according to McDonald's recall

I love these glasses so I'm quite upset but here is the info on how to return your Shrek glasses for a refund. From the McDonald's website......

How do I return my Shrek Forever After™ glassware?

Beginning Wednesday, June 9^th, customers can return their glassware to any McDonald’s restaurant and receive a refund.  Returns will only be accepted inside the restaurant.  Customers will be instructed by a manager to sign a refund slip and will be refunded $3 for each glass returned.  No receipt is necessary.