the beverage can presents immediately below the lid a first chamber not initially containing beverages ready for use , but intended to receive the final beverage , the first chamber being separated by a sealed baffle from a second chamber which already contains , a drinkable liquid ; the sealed baffle presenting a housing constructed to receive a filtering device provided with a tube intended to dip into the interior of the second chamber . elements are provided to enable the consumer to dispose the filtering device in the utilization condition in which communication is established between the two chambers via the filtering device such that , when the can is subjected to the action of a heat source , the liquid contained in the lower chamber is transferred into the first chamber by passing through the substance , to give rise to the formation of the beverage .