What product did Marilyn Chambers advertise before she starred in Behind the Green Door (1972)?

Marilyn Chambers’ face was featured on a box of Ivory Snow, before she starred in Behind the Green Door (1972).

Who was the last president to be elected without winning the largest share of the popular vote? Benjamin Harrison, Republican, in 1888, was the last president to be elected without winning the largest share of the popular vote. Fewer ballots were cast for him at the polling booth than for…
Who moved like “Jell-O on springs” and in what movie? According to Jerry/Daphne (Jack Lemmon), it was Marilyn Monroe as Sugar who moved like "Jell-O on springs, in Some Like It Hot (1959).
Who were the original angels in We’re No Angels (1955)? Humphrey Bogart, Aldo Ray, and Peter Ustinov were the escapees from Devil's Island in We're No Angels (1955). Robert DeNiro and Sean Penn were the angels in the 1989 film of the same…
How did the phrase Upside Down develop? The phrase upside down was believed to be an early form of upsedown or up so down. The phrase came into popularity during the Elizabethan Age.
Who wrote “The Lady or the Tiger?” Frank Stockton wrote the story "The Lady or the Tiger?" in 1882.
What movie featured the credit “Script by William Shakespeare, Additional Dialogue by Sam Taylor”? The Taming of the Shrew (1929), directed by Sam Taylor featured the credit "Script by William Shakespeare, Additional Dialogue by Sam Taylor".