because after the cut point the boundary layer of the flow is broken and begins to re develop the cooling element 1 is also equipped with a discharge channel 14 that enables the discharge of cooling fluid from the flow channel of the cooling element when the cooling element is mounted upright in such a manner that its inlet opening 2 opens upwards and its outlet opening 3 downwards the discharge of cooling fluid takes place by gravity through the outlet opening 3 namely cooling fluid then exits the channel section 4 through the smaller diameter channel 7 to the channel section 5 and flows on from the channel section 5 through the discharge channel 14 to the channel section 6 and out through the outlet opening 3 the discharge channel 14 is preferably dimensioned in such a manner that its cross section is clearly smaller than the cross section of the channel sections 5 6 and 8 thus during the use of the cooling element 1 there is hardly any pressure difference between the ends of the discharge channel 14 and consequently hardly any cooling fluid flows through the discharge channel 14 a full and easy emptying of the cooling element is advantageous because among other things it permits cold storage of the element without the emptying option a once filled cooling element may be.