Abstract: An apparatus and method in which the lateral surface of a sealed container (11) containing a beverage liquid (12) is pressed (21, 22) for deformation to measure the internal pressure (P) of the container, and displacement caused by the pressure and the load (F, 31) applied by the pressure is detected (35) so that the gas density of the beverage liquid may be evaluated from these values. An ultrasonic pressure wave is applied (111) to the sealed container to measure the sugar content of the beverage from the propagation velocity of the pressure wave received by an ultrasonic receiver (112), container surface temperature and the ambient temperature resulting from sensors (121, 122) and a calculation unit (50). For simultaneously measuring the gas density and the sugar content a gas density measuring unit (220, 230, 240) and a sugar content measuring unit (290) are provided.

Abstract: An apparatus for filling a container with drink liquid from a pressurized liquid-storage tank through a filling valve includes an auxiliary tank releasable to the air and provided between the liquid-storage tank and the filling valve. The auxiliary tank is communicated with the liquid-storage tank and the filling valve. After reducing the pressure in the auxiliary tank to atmospheric pressure by opening an air releasing valve installed in the auxiliary tank, drink liquid, which was supplied from the liquid-storage tank to the auxiliary tank in advance, is supplied from the auxiliary tank to the container via the filling valve.