Box of 10 Tampax tampons, junior

Box of 10 Tampax tampons (5 remaining), Junior, "Preferred by many for the waning days", featuring endorsement on packaging: "Accepted for Advertising by The Journal of The American Medical Association". "If you prefer MORE ABSORBENCY ask next time for either REGULAR or SUPER Tampax" emblazoned on red stamp in top right corner, Tampax Incorporated, Palmer, Massachusetts, 1940-1955

Tampax, developed by Colorado-based GP Earle Haas in 1931, was one of the first menstrual tampons (similar devices were previously used as contraceptives or for medical purposes). It consisted of a cylinder of compressed cotton with a string for easy removal, inserted via two telescoping cardboard tubes to avoid the need for users to touch it – or their genitals – directly. The product, a portmanteau of ‘tampon’ and ‘vaginal packs’, hit the shelves in 1936. A magazine advertisement from July that year invited readers to “Welcome this new day for womanhood”.

The first Tampax were sold in packs of 10, which the company considered “an average month’s supply” based on the principle that each tampon was capable of absorbing between one to two ounces, and the average flow “is only five to ten ounces”. The most absorbent tampons on the market today have a significantly lower rating of 18-21 grams (0.7 of an ounce). In 1939, the company introduced Super and Junior sizes alongside its Regular product. The latter were smaller than Regular Tampax and around two-thirds as absorbent, being designed for lighter flows and “the waning days” of menstruation.

Standardised absorbency testing was introduced in the 1980s after higher absorbency tampons were shown to be associated with an increased risk of developing toxic shock syndrome, a rare but life-threatening condition caused by bacterial infection.