7-Eleven is declaring Friday (Sept. 19) as Slurpee Name Your Price Day, giving customers the power to pay what they want for a large Slurpee. The one-of-a-kind promotion is a first for the retailer. Customers have the choice to pay 50 cents, $2, $50 or whatever they want, with all of what customers pay donated to Food Banks Canada, supporting local food banks.