The demand for raw materials and supplies created shortages so many products were rationed to make sure enough were available for military use. Meat and sugar were rationed to provide enough for the army. To save gasoline and rubber, gasoline was rationed, driving was restricted, and the speed limit was set at 35 mph. Every month each household would pick up a book of ration coupon. Blue coupons, called blue points, controlled meats, fats, and oils. Other coupons controlled items such as coffee and sugar. When people bought food, they also had to give enough coupon points to cover their purchases.