The sidewall portion 9 wherein said acute angle is variable between a first angle when the container is molded and empty, and a second angle when the container is filled, capped and cooled, wherein a measure of said first angle is greater than {HEAD ~ a measure} of {TAIL ~ said second angle} 
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The sidewall portion 9 wherein said acute angle is variable between a first angle when the container is molded and empty , and a second angle when the container is filled , capped and cooled , wherein a measure of said first angle is greater than { HEAD ~ a measure } of { TAIL ~ said second angle }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL