7-Eleven is marking its 98th birthday on July 11 with a nationwide celebration of its most iconic frozen treat.

Customers can enjoy a free small Slurpee drink at participating 7-Eleven, Speedway and Stripes stores nationwide.

“This Slurpee Day, we’re shaking things up with fresh flavors, our festive swag, and an exciting twist meant to leave a memorable mark on your tastebuds,” stated Marissa Jarratt, executive vice president and chief marketing and sustainability officer at 7-Eleven, Inc.

This year, the chain is introducing “tongue-toos,” a kind of temporary tongue tattoos that appear after sipping a Slurpee.

The tattoos, offered in shades of blue, green, red, and purple, showcase the Slurpee “S” logo and will be distributed to loyalty members at chosen 7-Eleven and Speedway stores in various cities such as Los Angeles, New York, Dallas, Detroit, and Chicago.

7-Eleven is also releasing limited-edition birthday-themed merchandise online via its 7Collection capsule.

Founded in 1927, 7-Eleven is the largest convenience retailer in the world, with more than 13,000 stores across the U.S. and Canada.