(Note: for a longer and more thorough treatment of this subject, go here)
I’m not, when I’m in a pub, a great worrier about what shape of glass my beer is served in, unlike my father, who would only drink out of a thin-walled straight glass – he said he couldn’t stand the feel of the thick-glass “mug” against his lips. The straight-sided, or slightly sloping-sided pint beer glass has been around from the early 20th century at least. But the authentic English “four-ale bar” (public bar) pint mug up to the end of the First World War was actually a china pot in a bizarre shade of pink with a white strap handle – see George Orwell’s classic “Moon Under Water” essay from the Evening Standard in 1946, where Orwell, always the inverted snob, complains that this working-class mug was getting hard to find.
The usual sort of glassware in Edwardian pubs was a handle-less sloping-sided, thick-walled “straight” pint mug (pewter was restricted to the saloon bar). Around 1928 the 10-sided or “fluted” handled glass pint mug came in, and this is the pint glass seen in all the “Beer Is Best” advertising put out by the Brewers Society in the 1930s (it is also, in this drinker’s opinion, the finest glass to consume English ale from).