Giant Food Stores encompasses Pennsylvania, Maryland, Virginia, D.C., Delaware, New Jersey and West Virginia and operates nearly 500 locations. Most stores double coupons, though the policy varies by location: some will double up to $0.50, others will double up to $0.99. The majority of locations will only double one like coupon per day. Giant has in-ad store coupons that can be stacked with manufacturer coupons when you use your Giant BonusCard at checkout. Sales run Sunday through Saturday.