Walt Disney Glass Pals, a series of six decals from 1975, available inside specially-marked boxes of Cheerios. Manufactured by Pro/Mark Inc. Chicago. The collection included Snow White with Dopey, Donald Duck, Jiminy Cricket, Mickey Mouse, Robin Hood, and Bambi with Thumper and Flower. Each measures approximately 1.75" x 2.5".
The decals could be placed on glasses or other smooth surfaces and were said to be dishwasher safe.
A Cheerios promotional tie-in appeared in the 1975 US Snow White pressbook (p.18). Twenty five million packages were produced. The mock-up box shown in the book, however, differs from the actual one.
Cereal box with Glass Pals promotion.