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Message: <blockquote data-quote="typo" data-source="post: 3534445" data-attributes="member: 83808">Chosun,I've got two wine containers here, one has a volume of 24.5l and the other 19.5l. Is that useful information when they both contain 12 bottles or 9l of wine? (Actually the contents is long gone.B <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> ) Likewise ER is a gross measurement and available ER is the nett measurement. The current ISO regulation seems to allow either to be used without specifying which. Seems ridiculous to me and may explain some of the problems you mention. There is no more inherent wriggle room with available ER than there is with the full ER. I'd still argue the nett ER is the more useful mesurement for punters like us.David</blockquote>