Universal base covering for metal containers

A combination structure including a container and a base covering wherein said container is a metal container of the type susceptible to rusting in a humid atmosphere and having a lower portion including a base wall at a lower terminus of said lower portion and including a circular peripheral rim having a lower surface adapted to contact a supporting surface whereby the container is positioned in an upright position and a circular side wall upwardly extending from said rim and wherein said base wall includes a central recess formed by portions thereof upwardly recessed from said rim lower surface, said base covering comprising a flexible and deformable inverted dome shaped imperforate cup having a body wall defining an open neck of a diameter smaller than that of said container base wall in its unflexed state and wherein said body wall includes an inner surface and wherein said cup is positioned on said container lower portion so as to cover said rim and bottom portions of said base wall with said open neck stretched to accommodate said container base and wherein bottom portions of said cup inner surface are upwardly received in said central recess and in at least partial face to face contact with said base wall so as to completely cover said container lower portion including said base wall and said rim, and wherein said bottom portions of said cup positioned within said recess remain flexible but unstretched.