Google Patents

Patent drawing for the Chalmers Menstrual Cup, Leona Chalmers, 1937.

The Tassette was a pliable rubber cup, worn within the vaginal channel where it collected menstrual blood. The cup offered limited reusability and was intended to eliminate concerns about leaking, odor, and disposal associated with other newly popular products. The cup never took off, possibly because of the complicated insertion and removal process. Such complications detracted from the ease and secrecy expected of menstrual management. Tassettes disappeared from the market until the 1950s due to rubber rationing during World War II.