Pyrex Mug - Ponderosa

Pyrex glassware was introduced to the public in 1915 by the Corning Glass Works. According to Barbara E. Mauzy’s Pyrex: The Unauthorized Collectors Guide, there are 3 basic types of collectible Pyrex: Clear Pyrex Ovenware (introduced in 1915), Pyrex Flameware (1936 - 1979) and Pyrex Colors (1947 - ?).

https://www.pyrexlove.com/history-of-collectible-pyrex/

In 1963, Dan Blocker, who played Eric "Hoss" Cartwright on Bonanza,star ted the Bonanza Steakhouse chain. The first Bonanza opened in Westport, Connecticut. Sam Wyly and his brother Charles Wyly bought the small Bonanza restaurant chain three years later. The company grew to approximately 600 restaurants by 1989, when the Wylys sold it to Metromedia. In 1989, there were almost 700 Ponderosa locations. By 2003, there were fewer than 400 locations. As of June 2024, only 13 Ponderosa locations and 3 Bonanza locations currently remain open in the US.

https://en.wikipedia.org/wiki/Ponderosa_and_Bonanza_Steakhouses