Sperry & Hutchinson (S & H) Green Stamps were an important part of retail commerce in the mid-twentieth century.  Although these shopper premiums were first offered in 1896, they became widespread in the late 1930s.  Participating retailers gave shoppers stamps when they made purchases--usually a certain number of stamps per dollar spent.  Consumers could then redeem the stamps for products offered in the S & H catalog or in special Green Stamp redemption centers.  A wide variety of household products could be obtained.  While the stamps have fallen out of favor--though some retailers still offer them, and there is an online redemption site--consumers still expect stores to offer special bargains and incentives.