According to UK parliamentary debate on PACKAGING 5 July 2011
Packaging ...............
a pint glass is 65% lighter today than it was in 1940
a 33ml steel drinks tin has been reduced in weight by 63% since 1950
a 1 litre plastic detergent bottle is 585 lighter than it was in 1970
With thanks to Mark Pawsey MP
and the subseqent paper/minutes avaialble www.parliament. uk
Interesting point on cucumbers lasting longer when packed in plastic...
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