BigMouth Inc. North American Song Birds Musical Mug, Whistling Bird Coffee Cut, Holds 14 Oz, Not Microwave Safe BEWARE of counterfeits and knockoffs sold by other companies. Only products "Sold by BigMouth Inc are guaranteed genuine. Please contact Amazon & us immediately if you feel the product is a replica. This BigMouth Inc North American Song Birds Musical Mug allows you to go birding without ever leaving the house! Just lift it to hear the songs of eight North American birds. Musical mug plays back 8 authentic bird songs Made of high quality ceramic, it holds 14 ounces of your favorite beverage Hand wash recommended, do not microwave