The ideal temperature for beer is generally said to be around 4°C to 6°C. "Extra Cold" [extra: special, cold: coldness] is a way of enjoying beer by chilling it even further than usual, to around 2°C to 0°C. However, beer generally freezes (becomes slushy) at around -3°C. If it freezes, the balance of the flavor is disrupted, and the flavor may be impaired. This machine is a dedicated rapid cooling device that allows you to easily enjoy Asahi Super Dry at sub-zero temperatures at home, without directly chilling it in the freezer *1. Please enjoy Asahi Super Dry Extra Cold with this machine. Extra Cold Cooler You know how you want to drink ice-cold beer at a picnic or when you've just bought it? This is useful for those times. In addition to canned beer, it can also be used for canned juice, etc. This is an unused item, but it has been stored. Please note that the expiration date of the batteries is not listed. Since it is unused, the operation has not been confirmed. This is a current item, so please refrain from returns.