In his book, “Everything You Always Wanted to Know About Sex, But Were Afraid to Ask”, Dr Rubin mentions the Coca-Cola method, suggesting the acidic nature of the product, its effervescent nature and with regard to the once popular 6½ ounce bottle (before unscrew caps) built in applicator, thus could be used in bed.
Sheree Umpierre, Joseph Hill, and Deborah Anderson, for discovering that Coca-Cola is an effective spermicide,[93] and C.Y. Hong, C.C. Shieh, P. Wu, and B.N. Chiang for accidentally proving it is not.[94][95]
As a side note, the link also provides the 1993 Medicine winner:
Medicine - Presented to James F. Nolan, Thomas J. Stillwell, and John P. Sands, Jr., medical men of mercy, for their painstaking research report, “Acute Management of the Zipper-Entrapped Penis”.[10]