Contour
Contour has existed for over 500 years, despite seeming like a fairly modern fad. The cosmetic entrepreneur Helena Rubinstein made contouring a popular concept in 1935 because she wanted to sell different colors of foundation.
The Shower Hood
This invention became obsolete because of the accessibility of the shower cap, but we think that the shower hood should come back. Seriously, if you're someone who doesn't need or want to wash your hair daily, this invention is for you.