A self-heating container (1, 2) to prepare a fresh hot beverage containing a compartment containing a heat-delivering substance (8) to heat the liquid in the device, an airtight compartment (11) containing a measured amount of liquid to be heated, an airtight compartment containing a measured amount of dry matter for preparing a hot beverage, a filter (11) for separating the dry matter from the liquid (optional) and a compartment containing a measured amount of liquid to actuate the heat-delivering substance (8) with the attribute that the heat-delivering substance is actuated (13) simultaneously with the release of the dry matter to the compartment containing the measured amount of liquid to be heated during actuation.