The Flintstones/RocDonalds-themed collector's glass mug set was created by Hanna-Barbera and distributed only by McDonalds for a special in-store-only coffee and hot-chocolate promotion.

Done in traditional Bedrock-influenced pre-historic design elements, and includes the following mugs : 

Pre-Dawn Mug ~ 3 1/2" tall x 3" diameter

Rocky Road Mug ~ 3" tall x 3" diameter

TreeMendous Mug ~ 4" tall x 2 3/4" diameter

Each of these great Flintstones RocDonalds collector's mugs hold hot and cold beverages  

Mugs are labeled on bottom as pictured.

Very good condition - no cracks or chips