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Hi, I would like to comapre the LCA results of an 1 litre PET bottle with a 0,4 litre glass bottle (for the same kind of lemonade).

How should I choose the functional unit if the bottles have different sizes? Can I choose 1 litre of lemonade as the functional unit and then multiplicate the LCA results of the 0,4 litre glass bottle by the factor 2,5 to get the results for 1 litre?
in openLCA by (120 points)

1 Answer

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by (107k points)
Well the question is if you can at all compare then the different sizes. Do they provide the same benefit? If you think yes then fine, but it seems a bit questionable.