Aluminium Ice Mat / Frozen Ice Pack for Food
Hot function for milk, black tea, coffee, hot dog, pizza etc.
Cold function for beer, Coca-Cola, beverage, juice, drink etc.
Cold way: put it to the freezer for 5 mins, it can keep cool for 30 mins
Hot way: put it to microwaver for 2-3 mins, or put into boiling water for 5 mins, and it will be heated fully