A method of dispensing carbonated beverage, said method comprising the steps of: providing a beverage dispensing system, said beverage dispensing system comprising a pressure chamber, said pressure chamber accommodating a collapsible beverage container made of a flexible material, said collapsible beverage container including a beverage space containing carbonated beverage and a head space containing gas, a dispensing device including a tapping valve and defining a beverage dispensing position and a non-beverage dispensing position, a tapping line interconnecting said collapsible beverage container within said pressure chamber and said dispensing device, and an interruption valve defining an open position and a closed position, said open position allowing carbonated beverage to flow from said beverage space to said dispensing device when said pressure chamber is pressurized, said closed position preventing carbonated beverage from flowing from said beverage space to said dispensing device, said interruption valve assuming said open position when the pressure within said collapsible container exceeds a specific non-zero pressure reference and said interruption valve assuming said closed position when the pressure within said collapsible container falls below said specific non-zero pressure reference, the method further comprising maintaining a first elevated pressure within said pressure chamber, said first elevated pressure acting on said collapsible beverage container so as to crumple said collapsible beverage container and thus establishing a second elevated pressure within said collapsible beverage container, said first elevated pressure being equal to the sum of said second elevated pressure and a container crumpling pressure, which container crumpling pressure is the pressure required to crumple the collapsible beverage container, said second elevated pressure exceeding a specific non-zero pressure reference, and the method further comprising operating said dispensing device from said non-beverage dispensing position to said beverage dispensing position for causing said carbonated beverage to be dispensed at said dispensing device and said collapsible beverage container to crumple, said interruption valve being in said open position. providing a beverage dispensing system, said beverage dispensing system comprising a pressure chamber, said pressure chamber accommodating a collapsible beverage container made of a flexible material, said collapsible beverage container including a beverage space containing carbonated beverage and a head space containing gas, a dispensing device including a tapping valve and defining a beverage dispensing position and a non-beverage dispensing position, a tapping line interconnecting said collapsible beverage container within said pressure chamber and said dispensing device, and an interruption valve defining an open position and a closed position, said open position allowing carbonated beverage to flow from said beverage space to said dispensing device when said pressure chamber is pressurized, said closed position preventing carbonated beverage from flowing from said beverage space to said dispensing device, said interruption valve assuming said open position when the pressure within said collapsible container exceeds a specific non-zero pressure reference and said interruption valve assuming said closed position when the pressure within said collapsible container falls below said specific non-zero pressure reference, the method further comprising maintaining a first elevated pressure within said pressure chamber, said first elevated pressure acting on said collapsible beverage container so as to crumple said collapsible beverage container and thus establishing a second elevated pressure within said collapsible beverage container, said first elevated pressure being equal to the sum of said second elevated pressure and a container crumpling pressure, which container crumpling pressure is the pressure required to crumple the collapsible beverage container, said second elevated pressure exceeding a specific non-zero pressure reference, and the method further comprising operating said dispensing device from said non-beverage dispensing position to said beverage dispensing position for causing said carbonated beverage to be dispensed at said dispensing device and said collapsible beverage container to crumple, said interruption valve being in said open position.