A cup with hollow lower bowl includes a cup body, the cup body is divided into an upper bowl and a lower bowl integrally formed with the upper bowl, a cradle extends from the lower bowl, and a plurality of ventilation notches are defined at intervals at a joint of the lower bowl and the cradle. A one-piece cup with hollow lower bowl includes a connection portion and two sub-cups with hollow lower bowl, the two sub-cups with hollow lower bowl are symmetrically arranged and are integrally formed with the connection portion, and each of the two sub-cups with hollow lower bowl is configured as the above cup with hollow lower bowl.