Kolder Mini Measure, red (13211PRO). Official HIC listing: heavyweight glass; 2" x 2" x 2.5"; capacity 1 oz, 2 tbsp, 6 tsp with permanent incremental markings; weighted base. Heat-safe for warmed ingredients up to 190°F. Hand wash. HIC notes Kolder founded in Dallas in 1962. Specs from the hickitchen.com Kolder Mini Measure, Red page.
The little red glass. Shot-size measures for extracts and bar pours.