11 until the depth sufficient for the optimal milk frothing result is reached dimension ho and can be set in the defined end position the base member 1 is so configured that it can cover in every position an opening 20 in the housing by means of a shield 13 or an orifice plate in order to thereby safeguard protection of the user and the device although it is not shown in fig1 to 3 the longitudinal guide 10 may also be arranged such that the base member 1 and the steam pipe 2 which extends through it can be displaced not exactly vertically but with a slight inclination further although illustrated only diagrammatically by means 50 driving motion the vertical adjustment of the base member 1 with the steam pipe 2 extending through it is effected the intended movement can either be carried out completely manually or lifting only can be effected manually and lowering the base member 1 takes place automatically in addition either lifting or lowering the base member 1 may be performed automatically as an alternative driving mechanism 50 such as a spring mechanism a pneumatic or hydraulic or also an electromechanic drive which are needed for this purpose may easily be drafted and realized by any expert in the art the dimension x in fig2 indicates the difference in height which is produced between the top position illustrated in fig2 and the bottom position illustrated in fig3 also it becomes apparent from fig2 and 3 that the nozzle 4 with the range spacer 6 forms a preferably integral nozzle member 21 and that this nozzle member 21 is slipped on the foremost part of the steam pipe 2 in an exchangeable fashion to permit.