Device and method for aerating a food substance

A method for aerating a food substance in a vessel defining a space for holding the food substance, the space being bordered at sides by an inner wall of the vessel, wherein:

• an aerator attached to a drive unit is rotated by the drive unit about an axis of rotation,
• the aerator comprises a plurality of filaments, the plurality of filaments being attached to the aerator at their proximal ends and being free at their distal ends, each of the plurality of filaments having a first state and a second state, wherein each of the plurality of filaments undergoes a reversible elastic deformation when being bent by a transverse force from the first state to the second state and wherein each of the plurality of filaments performs a spring-back action from the second state to the first state lowering the spring tension, when the transverse force acting on the filament drops to zero,
• the distal ends of the plurality of filaments temporarily contact the inner wall of the vessel during one rotation of the aerator about the axis of rotation,
• wherein during every rotation of the aerator, the distal end of each of the plurality of filaments contacts the inner wall at a first rotational position of the aerator, on further rotation of the aerator, the inner wall applies the transverse force on the filament and bends the filament from the first state to the second state by reversible elastic deformation, the distal end of the filament scrapes along the inner wall of the vessel and at a second point of rotation, the transverse force applied by the inner wall on the filament drops to zero and the filament performs a spring-back action from the second state to the first state, lowering the spring tension.