I have been under the impression that tempered glass was now compulsory in UK pubs, our Pub gave the pub cricket club all it's "normal" glasses some years ago, the landlord said " can't use those type anymore", having caught one of the new glasses on a table and see it shatter into a million pieces I was suitably impressed if not a little embarrassed at having slung the precious liquid everywhere. Maybe it is a local Bye law like town centre pubs having to have doormen (or should that be person's) Plastic is better than no drink at all, maybe.