Amateur radio, also known as ham radio, is the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication. It also separates the men from the boys. This item can be customized with your name under the design on back. Leave message with seller at check out with name (12 Character Max) you would like to see. Other colors may be available. If you are interested in another color contact us and see if it is available. 20 oz. Stainless Steel Polar Camel Travel Mug features double-wall vacuum insulation with a clear lid. The mug has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal travel mug and is BPA and lead free. Feel free to contact us for your custom order needs.