Our obsession with “2-in-1” combinations knows no bounds. In the 1970s, all-in-one laundry detergent and fabric softener had people wondering what they would think of next. Fifty years later, folks are squeezing mayochup onto hamburgers and lathering with 2-in-1 shampoo and body wash. Notwithstanding these consumer products, there have been a few combinations in the automotive industry that prove quite useful – and less likely to cause dandruff.
