7-Eleven is bringing back its BYOC (Bring Your Own Cup) Day at the end of the month.

Ever see someone drinking a Slurpee out of a little league participation trophy? You might see one very soon. 7-Eleven is bringing back its BYOC (Bring Your Own Cup) Day at the end of the month.

On Saturday, August 27, Slurpee fanatics can fill up any "creative container" for $1.99 at participating 7-Eleven, Stripes. and Speedway locations, according to a news release.

"We know that Slurpee drinks are a summertime staple for customers, so we're bringing back BYOC Day to celebrate the popular frozen beverage for a second time this summer following a very successful Slurpee Day," said Dennis Phelps, 7-Eleven proprietary beverages senior product director in a news release. "We want customers to build the Slurpee drink of their dreams while having fun with their vessel of choice – and we can't wait to see some of the creative cups they come up with."

Now, you can't just show up to 7-Eleven with a giant cooler, there are rules to BYOC Day. Customers have to bring clean cups, confirm that the "cup" is leak-proof, and that it fits upright in the 10-inch diameter hole in the in-store display, according to the release.

The promotion is limited to one cup per guest. There are over 13,000 stores in the United States and Canada. Don't want to fill up a unique cup? The convenience store will also have $1 small Slurpees throughout the summer.

Gabriel Romero is the Hill Country reporter for MySA.com. He is a California transplant with a healthy curiosity of the Lone Star State.