Pepsi-Cola, the drink and the name, was invented in 1898 but was not trademarked until 1903. The logo was changed from an elaborate script to the modern block letters in 1963. Several different logos have been used. Until 1951, the words Pepsi and Cola were separated by 2 dashes. These bottles are called "double dash." In 1951 the modern logo with a single hyphen was introduced. The company went bankrupt in 1931 and the trademark as sold. Loft Candy Company bought Pepsi-Cola in 1939. All types of advertising memorabilia are collected, and reproductions are being made.