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When CAMRA was new in the early 1970s, they started a campaign for oversize glasses holding a pint to the line instead of a pint to the rim, so that there would be space for a pint of liquid and a head in the glass. The big breweries hated this idea and mounted a reactionary campaign arguing things like it would be too expensive to replace all the glasses, or serve customers the full measure they had paid for. (My father was a new recruit at Guinness and sadly one of his early tasks was the pint-to-brim campaign.)
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I no longer drink in pubs but in my neck of the woods, the pubs that specialised in cask ale often had lined glasses.

The problem was that many people insisted on the glass being filled to the brim, because they felt they were being short changed. So it solved one problem but created another.

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First sip's at the bar; then you can
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Here are your beers lads, I didn't spill anything! They taste good too.
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