Swiffer is a line of cleaning products by Procter & Gamble. Introduced in 1999, the brand uses the "razor-and-blades" business model; whereby the consumer purchases the handle assembly at a low price, but must continue to purchase replacement refills and pads over the lifespan of the product. Swiffer has become a half-billion dollar brand in fifteen countries. Swiffer WetJet is a mop. It only utilizes WetJet brand solvent in a special, unopenable bottle. It was introduced in 2001 in Canada and Belgium but came to the United States in 2002. Its original name was the Swiffer WetJet Power Mop. It was originally blue-green in color until its redesign in 2006 when it changed to a purple color. It was modified again in 2009 with double sprayers added.Swiffer Sweeper is a combination sweeper-mop. That is, it can use either dry or wet-type disposable cloths. The wet cloths are for mopping and they have scrubbing strips which are for scrubbing tough dried-on greases. The dry type is for sweeping fine dirt, dust, hair, lint, and more. Originally, only the dry cloths were available, and was branded simply as "Swiffer" since it was the only product. Wet cloths for mopping were introduced in 2001.