Here is a vintage Pyrex clear glass divided dish made for Mealpack. The base is marked Pyrex Brand Glassware Made in USA for Mealpack. It also has the Mealpack logo in the center. The dish is 8 1/4" wide and 1 1/2" deep. Mealpack used this glass liner inside a metal insulated round lunch box. The metal portion was made in Japan, according the Corning Museum of Glass. This is a rare piece.