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(CNN) — Bring your own beaker, goblet or cup and slurp it up.

7-Eleven is hosting the first Bring-Your-Own-Cup Slurpee Day at United States stores from 11 a.m. to 7 p.m. Saturday to kick off peak Slurpee season.

This shot at brain freeze isn’t free, but customers at participating stores can fill their “cup” of choice for $1.49, the average cost of a medium Slurpee.

Note: A garbage can is not a cup. In-store displays with a 10-inch-diameter hole will rule out anything too ridiculously large for Slurpee consumption, and cups must be sanitary.

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But within those parameters, pretty much anything goes:

“From sand buckets to trophies, customers can unleash their creativity by bringing in their choice of a unique, fun Slurpee cup,” said Laura Gordon, 7‑Eleven’s vice president of marketing and brand innovation, in a statement.

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