Abstract: A mixing device for mixing nail polish and other liquids. There is: a tubular housing member; a compressible tubular casing member, disposed in an interior of the tubular housing member; a shaft member, coupled to the tubular housing member; a power module, in communication with the shaft member; and a control module, in communication with the power module, configured to control the provision of energy from the power module to the shaft member. The control module includes a timer module. The compressible tubular casing member is removably disposed in an interior of the tubular housing member. The power module comprises a motor. There is also a storage container, coupled to an end of the shaft member opposite the tubular housing member. The timer module is coupled to an exterior of the storage container; and the power module is disposed within the storage container.