[Beer-only mug] Doshisha Beer Mug, Beer Specialist, 450ml, Silver, Keeps drinks cold only, ON℃ZONE

Pouring a drink into a mug frozen in the freezer will instantly bring it to below freezing. Pouring a drink into a mug frozen in the freezer will instantly bring it to below freezing. Experience a new level of cold beer with its sub-zero throat-cooking sensation. For cold retention only. Vacuum + cooling 3-layer structure. Vacuum insulation structure keeps drinks cold. Built-in coolant cools drinks to ice-cold temperatures. Pour beer that has been chilled in the freezer for 12 hours or more into the mug, or beer that has been thoroughly chilled in the refrigerator. Stir and it will be below freezing in about 1 minute. Experience a beer that is even colder than ice-cold in about 1 minute.