Mint OREO Bined Manh Served upside down or the next one's free* "Upside down at participating locations. Limit one per person. Only one Blizzard' treat is fiped in the drive-thru and on multiple orders. Coupon for a free small Bizad' treat can be redeemed on the next visit. COOKIE Blizzard TREAT OREO cookie pieces and cool mint Mint OREO Bined Manh Served upside down or the next one's free* "Upside down at participating locations. Limit one per person. Only one Blizzard' treat is fiped in the drive-thru and on multiple orders. Coupon for a free small Bizad' treat can be redeemed on the next visit. COOKIE Blizzard TREAT OREO cookie pieces and cool mint