The disposable diaper industry is extremely competitive. It's also relatively young in terms of manufacturing. The Atlantic explained that the U.S. market is largely in favor of disposable diapers, seeing as 95 percent of babies wear them. In fact, each child goes through roughly 8,000 disposable diapers on an annual basis. But the invention only goes back to the 1940s and first "Boater" was offered for sale in 1949. Marion Donovan not only invented the product but was also manufacturing them before the trend eventually took off.