What is the Japanese ice hand rush? Hot hand flush with ice is a Japanese ice hand flush?

Professional coffee knowledge exchange more coffee bean information please follow the coffee workshop (Wechat official account cafe_style) recently the weather is slowly getting hot, it is very suitable for a cup of iced coffee! If you want iced coffee but you don't have a curling kettle and you don't want to wait a day or two, have a Japanese ice hand. But what is the Japanese ice hand? | Japanese ice hand rushes the so-called