Bring Your Own Cup To 7-Eleven's 2-Day Slurpee Event

DALLAS (CBS) -- The Slurpee turns 50 this year, and 7-Eleven is inviting customers to an indulgent celebration.

On "Bring Your Own Cup Day" this Friday and Saturday, Slurpee fans can to bring their own container to fill up with the sugary, icy drink for $1.50.

But before you lug that 48-quart cooler to the nearest 7-Eleven, there are some rules to follow.

The cup needs to fit upright through a 10-inch hole, it must be clean with no leaks and only one cup per person is allowed.

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• 7-Eleven