Rare 7-Eleven HUGE Big Gulp Insulated 100oz/2.9 L Fountain Mug is a promotional item used by the brand to advertise their beverages. This silver-colored mug is designed to hold a large volume of drink, making it a unique and eye-catching collectible for fans of 7-Eleven. With the brand's logo prominently displayed, this mug serves as a tangible reminder of the popular convenience store chain.