This mug was created for Mama Gruber's Fishhouse, a short-lived sister restaurant to Trader Vic's, to serve a drink called The Potwasher. When Mama Gruber's closed, the drink and mug was used at another sister chain to Trader Vic's, Senor Pico's. The mug shows a gray-haired lady with an anchor tattoo and a frying pan. Marked "Trader Vic's 1979" on bottom.