How did Liu Qian drink coffee in front of the mirror during the Spring Festival Evening?

Liu Qian picked up the cup with ice for the host, and then Liu Qian picked up the coffee pot. The host took the opportunity to put the cup with ice on the paper pad of the cup. In fact, the paper pad of the cup is to cover the hard plastic pipe protruding from the table, and there are rubber eyes under the cup. The host just inserted the rubber eye under the cup into the tube protruding from the table, and the ice was used to prevent the audience from seeing the eyes under the cup. The assistant in the box under the table blocked the plastic pipe with his hand, and the host began to pour coffee. When Liu Qian sucks, the assistant under the desk removes the plastic pipe and the coffee will slowly leak down. In the mirror, Liu Qian sucks coffee through a straw, which is a small bottle of coffee hidden in his hand or a cup of coffee hidden in the mirror.