The cap is a prescribed device fitted by a health care professional and is more expensive than other barrier methods such as condoms.Update Date: 2/26/2012Updated by: Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washin