Nipple shields.
D001733:Bites and Stings / Q000517:prevention & control*; D001940:Breast / Q000293:injuries*; D001942:Breast Feeding / Q000266:history*; D004864:Equipment and Supplies / Q000266:history; D005260:Female; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011247:Pregnancy