PepsiCo began test-marketing potential lemon-lime sodas in 1998, introducing a formulation known as Storm that never made it past the test-marketing stage. Prior lemon-lime sodas from PepsiCo included Teem, which had been introduced in 1960 but discontinued in 1984, when they introduced the Slice line of fruit-flavored sodas, which launched with a lemon-lime flavor. The company introduced Sierra Mist in 1999. The selection of the name "Sierra Mist" was based on favorable market research involving 2,000 people from over 1,000 possible names. "Sierra" had previously been a proposed name for what became the original (10% juice-formula, lemon-lime) Slice in 1984. "Diet Sierra Mist" was also introduced in 2000, and sales of both diet and original Sierra Mist totaled $100 million in its first year of production. Many PepsiCo bottlers continued to bottle 7 Up until existing agreements with Cadbury Schweppes expired in January 2003, at which point its distribution was expanded nationwide in the U.S. In 2004 the beverage had surpassed 7 Up on the basis of annual retail sales, placing it as the 2nd most-purchased lemon-lime soft drink in the U.S. (Sprite being the 1st).