Abstract: A cup includes a cup body and a base. The cup body consists of an outer cup; a revolving member, a decorative ring, and an inner cup having an upper flange adhered with the outer cup. The outer cup and the decorative ring are transparent, and the decorative ring and the inner cup are printed with patterns. The base has a housing containing a drive circuit, a motor and a rotating member and a bottom cap. The housing has an upper center recess for the cup body to rest on and automatically turn on the drive circuit to power the motor to rotate the rotating member through a gear unit. The rotating member has plural magnets to attract magnets of the revolving member.

Abstract: A cup consists of an inner body, an outer body and a rotatable base located between a hollow space formed between the inner body and the outer body. The rotatable base has a decorative paper and a plurality of magnets facing coils contained in an annular groove opening to the bottom of the outer body. A battery unit, a control circuit and the coils are contained in the annular groove. When the coils are energized by electricity of the battery unit, then the rotatable base together with the decorative paper is rotated by repelling force of magnetic fields produced by the coils interacting with the magnets of the rotatable base.