A device for mixing liquid material that contains a material to be dispersed and a liquid in a mixed state and is shaken to allow the material to be dispersed in the liquid such that the liquid material is whipped or frothed, the device characterized by comprising:
- a container extending in the longitudinal direction for containing the liquid material and whip or froth of the liquid material;
- an upper opening-closing member provided at an upper part of the container for taking in and out the liquid material;
- and
- a coil spring contained in the container, the coil spring having a constant winding diameter, the coil spring having a dense pitch at an upper end and a lower end, respectively, and a sparse pitch in a central part, the coil spring moving freely inside the container.