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Why does the sparkling variant have such a short shelf life?

April 26, 2017life shelf short Sparkling variant

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Why does the sparkling variant have such a short shelf life?

1 Answer

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PET (the plastic used in the bottles) is semi permeable and the bottle is a pressurised vessel. Gradually carbon dioxide will migrate through the PET. The shelf life is chosen so that there is a quantity of 2 volumes of carbon dioxide at the end of this time, which gives a good level of sparkle.