A new megaphone cup for providing a device that is convertible between a drinking cup and a megaphone. The inventive device includes a base having upper and lower surfaces with a tubular cup mount upwardly extending from the upper surface of the base. The cup mount has a lumen and an upper opening into...http://www.google.com/patents/US5967875?utm_source=gb-gplus-sharePatent US5967875 - Megaphone cup
