Reusable container unit having spaced protective housings

A reusable container unit for flowable materials, said unit having enhanced puncture resistance and leak prevention characteristics and comprising a substantially closed first wall means forming a vessel for containing said material and preventing leakage thereof, a substantially rigid protective shell formed by a substantially closed second wall means surrounding said vessel and spaced therefrom over at least a major portion of the outer surface of said first wall means to provide a protective spacing between said first and second wall means, wherein impact forces on said shell are not readily transmitted to said vessel, spacer cushion means positioned between said first and second wall means for maintaining said protective spacing therebetween, first aperture means through said first wall means and second aperture means through said second wall means forming an access port entering into said vessel for filling and emptying the same of flowable material, first closure means for said first aperture means and second closure means for said second aperture means, said first and second closure means being operable for selectively sealing or opening said apertures to allow the filling and emptying of said vessel, said first and second closure means being structurally and operably substantially independent of each other and spaced apart from each other to maintain the integrity of said protective spacing, third wall means forming a tubular shaped conduit having an inner end and an outer end and extending between said first and second wall means and having its said inner end sealingly affixed to said first wall means and its said outer end sealing affixed to said second wall means and encompassing said first and second aperture means respectively to substantially seal said third wall means between said first and second wall means and provide access to said first closure means for providing for the passage of said materials into and out of said vessel, said third wall means being readily distortionable under impact forces applied to said shell in the vicinity of said second closure means for minimizing the portion of said impact forces transmitted to said first wall means, and base means on said shell for contacting and stabilizing said container unit in at least one position on a support.