A truly unique mug. When it’s cold, it’s just a simple black mug. When you add any hot beverage (water, tea, coffee, etc.), your mug turns white and the image comes to life in vibrant colors. 11 oz. Hand wash only. Imported.
A card reader is a data input device that reads data from a card-shaped storage medium. Historically, paper or cardboard punched cards were used throughout the first several decades of the computer industry to store information and write programs for computer system, and these were read by punched card readers.
More modern card readers such as this one are electronic devices that use plastic cards imprinted with barcodes, magnetic strips, computer chips or other storage medium.