Device for producing a frothed liquid comprising a chamber (13) opened to atmosphere with a transverse bottom wall (14) and a longitudinal upward wall (15), at least one diluent inlet (18), at least one liquid delivery outlet (20), wherein the diluent inlet is provided through the upward wall and is dimensioned and oriented for directing a thin jet of diluent in the chamber, and wherein the at least one liquid delivery outlet is configured in the bottom wall for liquid to rise up along the side of the upward wall (15) by the jet of diluent entering the chamber as a result of the direction and dimension of the diluent inlet in the chamber.