Patent ID: 8468782

Claim:
A method of producing a container, the container comprising: a body having walls defining interior of the container; and a base sealed to the body; the method comprising: introducing the base into the body, the body being stretched or expanded, at least in a region of introduction, by a predetermined amount before and/or during introduction of the base; wherein the base comprises an edge, said edge being arranged inside the body, and folded inwards between the base and the body so as to form a reinforced peripheral rim; wherein a support-forming seal is formed between the body and a peripheral rim of the base; wherein the support-forming seal comprises a structured surface, and the structured surface comprises a grooved or fluted surface; and wherein a degree of taper of the stretched or expanded region of the body relative to an unstretched or unexpanded body is in a range of 5° to 14.4°.