 Detergent pods cost significantly more than liquid detergent for equivalent laundry loads.Laundry tabs were originally introduced in the 1960s in a compacted granular form (similar to an oral medical tablet), when Procter & Gamble launched Salvo tablets, later disappearing from the market in the 1970s.In the 1990s, Unilever and Henkel launched a similar laundry detergent pack product sold in Western Europe.