Pasteur pipettes are also called teat pipettes, droppers, eye droppers and chemical droppers. These were consisted of bowls, dishes, pots, jarlets, covered boxes and lastly water droppers. Ink sticks, water droppers, and a small knife were also part of a calligrapher's set. Replacement tubers called "droppers" form at the end of long root-like stolons. The tuber produces two "droppers" which become daughter tubers in the following year. The tuber produces two "droppers" which become the daughter tubers in the following year. Modern systems use current-carrying droppers, eliminating the need for separate wires. The Wiggles and some kids are doing paintings using droppers. In 1952 Ginyard also formed secular vocal group the Du Droppers. They discuss foreign baby droppers who come to give birth in the U.S. The Du Droppers were an American doo-wop group formed in Harlem, New York, in 1952.