A method for metering and storing liquids by means of a permanently open container (1), wherein: the container (1) comprises a liquid reservoir (11) in which at least one liquid (2) is contained for storage; the container (1) has at least one opening (15) for the metered discharging of the liquid from the liquid reservoir (11); the opening (15) is permanently open; influencing factors affect at least one change in pressure (4) in the container (1); influencing factors render the system formed of the container (1) and liquid (2) unstable; the pressure (4) is detected in at least one location in the container (1); and, subject to at least one detected change in pressure (4), at least one reaction (9) is initiated that is suitable for maintaining the system of the container (1) and liquid (2) in a stable state or for re-establishing this stable state.