Star Trek Promotional Pinball Drink Coasters. These were made to promote the upcoming Williams game Star Trek: The Next Generation made in 1993. A total of 3 coasters two with the same artwork. one of each still has the protective film on it. These would make a great addition to your Star Trek Collection or your Pinball. Dimensions for all three are: 4 1/2" by 4 1/2" by 2mm.