There is provided a container having a container with open end, and a bottom cap has a sealant material bonded thereto to provide a hermetic seal between the bottom cap and the open bottom of the container and a grip surface through or slightly beyond the exterior surface of the bottom cap to contact...http://www.google.com/patents/US6142325?utm_source=gb-gplus-sharePatent US6142325 - Container assembly and bottom cap therefor
