Agree this is a fact - we mark our glasses because of it. https://www.gov.uk/weights-measures-and-packaging-the-law/print https://www.gov.uk/weights-measures-a

Agree this is a fact - we mark our glasses because of it. https://www.gov.uk/weights-measures-and-packaging-the-law/print https://www.gov.uk/weights-measures-and-packaging-the-law/pr...