"Three-in-one coffee" is also called "instant coffee": it refers to the mixture of creamer, sugar and coffee, which is instant. The listing time of three-in-one coffee abroad should be 20 years ago, mainly for the convenience of office workers to carry it outside for convenient brewing; Or places that pursue fast and efficient consumption, such as fast food and economical catering, are generally 700 grams or 1000 packs.