1969—Sex Sells Sodium Bicarbonate.

(click ad) The sexual revolution was in full-on heat and, well, nobody wanted to fuck Speedy. So, enter the bikini babe, suggestively sliding a packet into her nether regions. She had the cure for your love hangover (image via).
Previously in Sex Sells Unsexy Products: Method floor cleaner. Heinz Soup. Widex hearing aids. Rachachuros meat seasoning.