A device for packaging beverage in containers, the device comprising: a first tank, a transport circuit connecting the first tank to an outlet orifice through which the beverage can flow into a container for filling, the circuit including a filter and a draw-off valve, · a second tank arranged in the circuit between the filter and the valve, and placed above the valve; · a beverage transport pipe connecting the second tank to the valve; and · a pipe for admitting an inert gas into the second tank; the second tank being closed and proof against air and the inert gas, the device being characterized in that it further comprises means for maintaining the height of the column of beverage at a value that is substantially constant, the height of the column of beverage being the difference in altitude between the free surface of the beverage in the second tank and the outlet orifice; and in that at least a wall of the second tank is sufficiently deformable under the effect of a pressure difference between its inside and outside faces to maintain an inert gas plenum admitted into the tank by the pipe at a pressure that is close to ambient pressure, such that the beverage present in the second tank does not come into contact with ambient air and, throughout the duration for which the draw-off valve is open, the beverage can flow freely, by gravity, in a transport pipe, from the second tank to the outlet orifice, at a substantially constant gravity flow rate that is not influenced by clogging of the filter. a first tank, a transport circuit connecting the first tank to an outlet orifice through which the beverage can flow into a container for filling, the circuit including a filter and a draw-off valve, · a second tank arranged in the circuit between the filter and the valve, and placed above the valve; · a beverage transport pipe connecting the second tank to the valve; and · a pipe for admitting an inert gas into the second tank; · a second tank arranged in the circuit between the filter and the valve, and placed above the valve; · a beverage transport pipe connecting the second tank to the valve; and · a pipe for admitting an inert gas into the second tank; the second tank being closed and proof against air and the inert gas, the device being characterized in that it further comprises means for maintaining the height of the column of beverage at a value that is substantially constant, the height of the column of beverage being the difference in altitude between the free surface of the beverage in the second tank and the outlet orifice; and in that at least a wall of the second tank is sufficiently deformable under the effect of a pressure difference between its inside and outside faces to maintain an inert gas plenum admitted into the tank by the pipe at a pressure that is close to ambient pressure, such that the beverage present in the second tank does not come into contact with ambient air and, throughout the duration for which the draw-off valve is open, the beverage can flow freely, by gravity, in a transport pipe, from the second tank to the outlet orifice, at a substantially constant gravity flow rate that is not influenced by clogging of the filter.