As a person who has spend many meals eating out, I have noticed at the bottom of many glasses there is an “L.” (Actually it’s on the OUTSIDE bottom.)
My guess is that it’s either the initial of the glass manufacturer, or some unknown industry identifier.
Any ideas?
Libby Glass?
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Perhaps “Limoges” ?
I know all the joints I eat in use Limoges china and porcelain exclusively.
Uke
Keep drinking,
The more you drink, the more letters are revealed.
First an “L”, then an “O”. It will turn out to say “Look”
Then an “Out” will be revealed…
Than a “you’ve” a “just” a “been”…
“P-O-I-S…”
Why Inky: I didn`t know you were a “Prisoner” fan 
If it is an upper case cursive “L”, that glass is manufactured by Libbey Glass.
One complete set of morals for sale to highest bidder, new in box.
Yes, it’s consistently upper case and cursive.
No chance it could mean “Liter” right?
As a ignorant fellow from a non-metric country, is a liter too much to drink in one sitting?
Oh, for heaven’s sake, Inky, a liter is – for all intents and purposes – a quart.
Depends on how thirsty you are.
Beer is often served in liter glasses in Germany…even in France.
Uke
As I hail from the Glass City, I presume you are drinking from Libbey Glass glasses, brought to you by Libbey, Inc., LBY on the Big Board.
What about the Star on the bottom of my “not quite a” pint glasses at the local watering hole
I feel more like I do now than I did when I got here.
For a moment there, I thought Inky was gonna spell L-o-v-e-r-o-c-k.
I agree with Ike, depends on how thirsty you are. Inky, think “half of a 2-liter bottle”, could you drink that much in one sitting?
You’d be better off ordering a pint o’beer, drinking up, and then seeing if you want more.
If you think you can handle the whole quart, you’ll be presented with a nice fresh glass of chilled beer with a good frothy head on it.
Just my opinion.
Uke
One complete set of morals for sale to highest bidder, new in box.
The “L” is more like the symbol for “pound”, as in “British Pound” or “pounds sterling.”
Those pint glasses are also called pound glasses.