A ball roller assembly may include an inner sphere that is constructed from a thermal-sensitive material. The ball roller assembly may also include an outer sphere that is constructed from a thermal-conductive material. The inner sphere may be disposed within the outer sphere and thermal transfer may occur between the inner sphere, the outer sphere, and a user of the ball roller assembly. The ball roller assembly may further include a housing constructed from a thermal- insulative material, and the outer sphere and the inner sphere may be disposed within the housing. The inner sphere may be selectively removable from the outer sphere and the outer sphere may be selectively removable from the housing.
