FREE 20-oz. Coke for Military Families! December 9, 2011 by Queen Mum 3 Comments Share The USO is giving military families a FREE 20-oz. Coke this season to help celebrate their 70th anniversary and their 70-year partnership with Coco-Cola! Just print this coupon and take it to your commissary to redeem. Get your coupon HERE. Thanks Johnathon F.!