it was not successful. In 1931, rolls of pineapple and cherry fruit drops were also introduced. As the public response proved positive for these, a new variety of mint called Cryst-O-Mint, made in this same crystal-like style, was introduced in 1932. In 1935, the classic "Five Flavor" rolls were introduced, offering a selection of five different flavors (pineapple, lime, orange, cherry, and lemon) in each roll. This flavor lineup was unchanged for nearly 70 years, until 2003, when three of the flavors were replaced in the United States, making the rolls pineapple, cherry, raspberry, watermelon, and blackberry. However, orange was subsequently reintroduced and blackberry was dropped. The original five flavor lineup is still sold in Canada. In the late 1930s and early 1940s, four new mint flavors were introduced: Molas-O-Mint, Spear-O-Mint, Choc-O-Mint and Stik-O-Pep. During the Second World War, other candy manufacturers donated their sugar rations to keep Life Savers in production so that the little candies could be shared with Armed Forces as a tasty reminder of life at home. Soon after the war ended, the manufacturing license was withdrawn. In 1947, U.K.-based Rowntree's—which formerly had been licensed to make Life Savers—started to manufacture a similar product called the Polo mint. In 1981, Nabisco Brands Inc. acquired Life Savers from the E.R. Squibb Corporation. A number of early mint flavors, including Cl-O-Ve, Vi-O-Let, Lic-O-Rice and Cinn-O-Mon were discontinued due to poor sales. Nabisco introduced a new Cinnamon flavor ("Hot Cin-O-Mon") as a clear fruit drop-type candy. This replaced the white mint flavor Cinn-O-Mon, which had recently been discontinued. The other original mint flavors were retired. A number of other flavors were also quickly discontinued, after Nabisco took over, in order to make the business more profitable. In 2004, the U.S. Life Savers business was acquired by Wrigley's. Wrigley's introduced two new mint flavors (for the first time in over 60 years) in 2006: Orange Mint and Sweet Mint. They also revived some of the early mint flavors (such as Wint-O-Green). Life Savers production was based in Holland, Michigan, until 2002 when it was moved to Montreal, Québec, Canada due to significantly lower sugar prices in the new location. The company's headquarters in Port Chester, New York, where Life Savers were made from 1920 until 1984, was distinctive. Although it has been converted to apartments, it still retains some Lifesavers signage. It was added to the National Register of Historic