bottle this facilitates effective pasteurization or deep freezing of the bottle 39 s contents application_number US 94302586 A description each of the two embodiments to be described provides a heat exchange fluid passage between a bottle and its base in the embodiment shown in fig1 through 4 a bottle or container 10 is fitted with a base 11 the bottle 10 which is known per se contains any liquid 12 to be pasteurized and has a rounded bottom 13 and a cylindrical lateral wall 14 the base is in the form of a cup having a bottom part a support boss 17 and a cylindrical lateral wall 16 the bottom part consists of a central part 15 spaced from the bottom of the bottle 10 and surrounded by an annular curved area 23 defining a support and centering area for the rounded bottom of the container 10 the annular support boss 17 is pierced at its end by a plurality of orifices 18 constituting a fluid outlet these orifices are circumferentially distributed and spaced from a bearing area 30 of the boss the lateral wall 16 of the base has in its upper part the annular fixing area 19 provided with a plurality of axially oriented recesses 20 a passage 50 for heat exchange fluid is defined by the wall of the bottle between the fixing area 19 and the support area 23 on the one hand and the wall of.