Sealing arrangement for plastic container

Claim 1

A CONTAINER COMPRISING IN COMBINATION: AN OPEN END CONTAINER BODY HAVING A GENERALLY CYLINDRICAL SIDE WALL STRUCTURE AND AN INTEGRALLY FORMED BOTTOM WALL STRUCTURE AT ONE END OF THE BODY, THE OTHER END OF THE BODY BEING OPEN; BARB MEANS ON THE OUTER SURFACE OF THE SIDE WALL STRUCTURE OF THE CONTAINER BODY ADJACENT THE OPEN END THEREOF; CLOSURE MEANS ADAPTED FOR PLACEMENT DOWNWARDLY OVER THE OPEN END OF THE CONTAINER BODY AND HAVING A DEPENDING SIDE WALL STRUCTURE, THE INSIDE DIAMETER OF THE DEPENDING SIDE WALL STRUCTURE BEING SUBSTANTIALLY THE SAME AS THE OUTSIDE DIAMETER OF THE SIDE WALL STRUCTURE OF THE CONTAINER BODY; GROOVE MEANS FORMED IN THE INNER SURFACE OF THE DEPENDING SIDE WALL STRUCTURE OF THE CLOSURE MEMBER, THE GROOVE MEANS BEING ADAPTED TO REMOVABLY MATE WITH THE BARB MEANS ON THE CONTAINER BODY WHEN THE CLOSURE MEMBER IS POSITIONED OVER THE OPEN END OF THE CONTAINER BODY; AND RESILIENT SEALING MEANS ADAPTED FOR POSITIONING BETWEEN THE CONTAINER BODY AND THE CLOSURE MEMBER AND ADAPTED TO URGE THE CLOSURE MEMBER AWAY FROM THE CONTAINER BODY WHEREBY THE BARB MEANS ARE MAINTAINED IN POSITIVE LOCKING ENGAGEMENT WITH THE CORRESPONDING GROOVE MEANS AND WHEREBY A FLUID-TIGHT SEAL IS EFFECTED BETWEEN THE CLOSURE MEMBER AND THE CONTAINER BODY.