Number of weeks an opened bottle of tawny Port lasts. One of the most popular styles of Port for its luscious nutty, vanilla, and ripe fruit flavors, tawny Port is sensational with pumpkin pie and pecan pie. (Hello Thanksgiving). Tawny Port comes designated as 10-, 20-, 30-, and even 40-year-old. The number represents the average age of the wines in the blend. Among our favorite tawny Ports are the 20-year-old and 30-year-old tawnies from the Port shippers Grahams and Fonseca.