Pint a limited extent in Commonwealth nations. In the United States, two pints are used: a liquid pint (≈ 473 ml) and a less-common dry pint (≈ 551 ml). Each of these pints is one-eighth of its respective gallon, but the gallons differ. This difference dates back to 1824, when the British Weights and Measures Act standardised various liquid measures throughout the British Empire, while the United States continued to use the earlier English measure. The imperial pint consists of 20 imperial fluid ounces and the US liquid pint is 16 US fluid ounces, making the imperial fluid ounce about 4%
Pint glass look-alike could naturally be affixed to the glass, as long as it is done in such a way that it is not confused with the CE marking". Selling beer in unmeasured glasses without using some other form of calibrated measure is illegal. Half-pint, one-third pint and two-thirds pint (schooners) glasses are also available, and are subject to the same laws. Although the glass must be accurately-calibrated, industry guidelines only require a pint to be at least 95% liquid, allowing 5% of the pint to consist of the foamy 'head'. The Campaign for Real Ale (CAMRA) has described this practice as