What is "whippers"

Usage examples of "whippers".

Meanwhile, the cream can business, under the watchful eyes of Horace Craig and Heinrich Von Vechten, continued to prosper and grow-- by 1914, on the eve of the Great War, the Von Vechten-Craig Cream Can Company had expanded to include the production of sanitary ice cream containers, paddles, scoops, churners and whippers, egg crates, milk bottles, cream cartons, butter boxes, and ice trays.