McDonalds memorabilia is always highly sought after!  These 3 glass mugs (not plastic!) show the McDonald's character, Captain Crook, playing baseball and are in mint condition. They are from the Sports Series that was debuted in the 1970's. They measure 4.5" tall. 

A little on the history of collectible glassware: In the past, fast food restaurants, supermarkets and gas stations used to give out commemorative collector’s glasses as a premium with a purchase of food or drinks. They were made from actual glass, not plastic, and were illustrated with first-rate graphics. The heyday of collector’s glasses was in the 1970s and 1980s although there has been a resurgence of new glasses (and collecting) with the release of the latest Star Wars movie.