This is a compact cooler that was a prize for collecting 48 entry stickers from Asahi Super Dry beer! You could get it by sending in the stickers. It uses 4 AA batteries and a special cartridge filled with tap water and salt to freeze and experience the "crisp taste, sharpness, and refreshing feel." Perfect for family gatherings, camping trips, after a bath, or as a reward for yourself after a long week, paired with your favorite drink and snacks. *Note: Opened for cleaning and inspection. The outer box shows some dirt and minor dents. The cartridge is unopened, so the operation has not been confirmed.