7-Eleven's famous frozen drink is called the Slurpee.
The Slurpee is a carbonated, flavored frozen beverage sold through self-serve machines in 7-Eleven stores. Its texture is semi-frozen rather than solid, allowing it to be dispensed and consumed through a straw.
The drink originated as the Icee, created by the Icee Company. 7-Eleven began selling the beverage under the Slurpee name in 1966 after reaching an agreement with the manufacturer. The new name helped turn the drink into a distinctive 7-Eleven product.
A common mix-up is treating Slurpee and Icee as identical brand names. They are closely related frozen carbonated beverages, but Icee is the original brand name and Slurpee is 7-Eleven's branded version.