Height. It is stipulated that the weight of a single cup is equal to or greater than 3 kg, that is, a weight of 3 kg is placed on the cup, and the change of the cup height within one minute does not exceed 5% of the height of the cup itself. Bearing capacity is the key index of this kind of product performance. According to the national standard of disposable plastic tableware, when the weight of disposable plastic cup is 3kg at room temperature, the height change rate must be less than 5%.