The reason why "Classmate Xiao Ming" has a two-layer lid is to increase the friction of opening the bottle.

There is another reason. I think it is to add a gimmick. When other drinks only have one lid, the two-layer lid of "Xiao Ming Classmate" has become a very good gimmick. It's an alternative way of publicity.

Classmate Xiaoming is a tea drink called Classmate Xiaoming cold brew tea launched by Uni-President Group in March 2015. Its brand spirit is to "make people relaxed, happy, and amused" . Xiaoming's cold brew tea uses a cold brewing process that is different from traditional tea making, making the tea refreshing, sweet and not bitter.

As a representative character IP, Xiaoming is a name with associations and memories. He is not only mentioned in homework books, but also among classmates at school. When he grows up, different people mention him. It's also a name with a ring to it.

Carrying the memory of the public, inspired by the rise of the concept of cold brew tea in street shops, Xiao Ming’s cold brew tea was launched in 2015. It adheres to the funny brand spirit and attitude and arouses the audience’s interest. *Ming, thus creating a sense of brand belonging. The sweet but not bitter cold brewing process and excellent taste make students accept tea drinks and fall in love with tea.

Baidu Encyclopedia-Classmate Xiaoming