A method for installing a collapsible beverage container in a beverage distribution unit comprising the steps of providing: said beverage distribution unit including: a receptacle positioned on a substantially horizontal plane and defining an inner cylindrical surface, an open upwardly facing curved rim and a closed downwardly facing end, and a support surface located a specific distance above and outside said rim of said receptacle, said support surface defining a curvature which has an opposite orientation relative to the adjacent curvature of said rim, and said collapsible beverage container defining a cylindrical body fitting inside said receptacle, a convex shaped first end defining a first contact area, and a convex shaped second end, said convex shaped second end defining a second contact area, said second contact area having a curvature corresponding to the curvature of said support surface, and performing the steps of: positioning said collapsible beverage container in a sloped first position such that said first contact area is contacting said horizontal plane and said second contact area is contacting said support surface, pivoting said collapsible beverage container from said first position in a rotational motion around said support surface to a second position in which said convex shaped first end is elevated while said second contact area remains contacting said support surface, and sliding said collapsible beverage container on said support surface and on said inner cylindrical surface of said receptacle from said second position to a third position inside said receptacle, in which said convex shaped second end is positioned juxtaposed said closed downwardly facing end. said beverage distribution unit including: a receptacle positioned on a substantially horizontal plane and defining an inner cylindrical surface, an open upwardly facing curved rim and a closed downwardly facing end, and a support surface located a specific distance above and outside said rim of said receptacle, said support surface defining a curvature which has an opposite orientation relative to the adjacent curvature of said rim, and a receptacle positioned on a substantially horizontal plane and defining an inner cylindrical surface, an open upwardly facing curved rim and a closed downwardly facing end, and a support surface located a specific distance above and outside said rim of said receptacle, said support surface defining a curvature which has an opposite orientation relative to the adjacent curvature of said rim, and said collapsible beverage container defining a cylindrical body fitting inside said receptacle, a convex shaped first end defining a first contact area, and a convex shaped second end, said convex shaped second end defining a second contact area, said second contact area having a curvature corresponding to the curvature of said support surface, positioning said collapsible beverage container in a sloped first position such that said first contact area is contacting said horizontal plane and said second contact area is contacting said support surface, pivoting said collapsible beverage container from said first position in a rotational motion around said support surface to a second position in which said convex shaped first end is elevated while said second contact area remains contacting said support surface, and sliding said collapsible beverage container on said support surface and on said inner cylindrical surface of said receptacle from said second position to a third position inside said receptacle, in which said convex shaped second end is positioned juxtaposed said closed downwardly facing end.