$5 Off DQ Or Blizzard Cake. Valid only at: Dq Grill & Chill Colonie location. www.OperationBrainFreeze.com. Limit one coupon per customer, per visit. Not valid with other offers, promotions, or discounts. Void if altered, copied, sold, exchanged or where restricted by law. No cash value. Plus tax is applicable. All trademarks owned or licensed by Am. D.Q. Corp. 2018. , TM, and 2018 O.J. of Am. Expires 5-15-20.