Abstract: A device for the preparation of a frothy liquid for human consumption includes a jet forming nozzle and an inlet of a liquid flow deflecting member arranged on opposed locations with respect to a collision chamber. The jet forming emits a traversing liquid jet that traverses the collision chamber along a path and enters the inlet and passes through to the outlet of the liquid flow deflecting member. The outlet is arranged in communication with the collision chamber and is aimed at the path of the liquid jet between the jet forming nozzle and the inlet, so that in use the liquid jet emerging from the outlet collides with the traversing liquid jet between the jet forming nozzle and the inlet of the liquid flow deflecting member. The collision causes air to be mixed with the liquid thereby generating frothed liquid.