 Burger 21 invites guests to experience the rich and creamy Triple Shot Espresso Shake. This limited time only milkshake will be available for purchase at all Burger21 Locations January 2nd through March 12th, 2023 TAMPA, Fla., Jan. 14, 2023 PRNewswire-PRWeb Burger 21 Invites Guests to Experience The Triple Shot Espresso Shake The Limited Time ...... 