![Guinness Pint glass. I know the 06 means .6 litres or 600ml, but I dont know what the 13 is... I also have a pint glass on the table with an 11 Guinness Pint glass. I know the 06 means .6 litres or 600ml, but I dont know what the 13 is... I also have a pint glass on the table with an 11](https://external-preview.redd.it/kIABN5EHxhtK8ZV-YC9Oypv7lBPxTFiG-Nn42kNNvBY.jpg?auto=webp&s=7a84379a9f1f276ad381362b8782909c9ab9ea0a)
Guinness Pint glass. I know the 06 means .6 litres or 600ml, but I dont know what the 13 is... I also have a pint glass on the table with an 11
![Fred Huebner on X: "What does the 6-13 mean on the Guinness glass I am finishing at D4 downtown? https://t.co/rqvqsRWvTD" / X Fred Huebner on X: "What does the 6-13 mean on the Guinness glass I am finishing at D4 downtown? https://t.co/rqvqsRWvTD" / X](https://pbs.twimg.com/media/CXvNCAuW8AAsKFz.jpg)
Fred Huebner on X: "What does the 6-13 mean on the Guinness glass I am finishing at D4 downtown? https://t.co/rqvqsRWvTD" / X
![a pint of Guinness with G8 formed on the head in Blakes bar in Enniskillen, Co Fermanagh, ahead of the G8 summit in Northern Ireland. 13/06/2013 Stock Photo - Alamy a pint of Guinness with G8 formed on the head in Blakes bar in Enniskillen, Co Fermanagh, ahead of the G8 summit in Northern Ireland. 13/06/2013 Stock Photo - Alamy](https://c8.alamy.com/comp/G664BM/a-pint-of-guinness-with-g8-formed-on-the-head-in-blakes-bar-in-enniskillen-G664BM.jpg)
a pint of Guinness with G8 formed on the head in Blakes bar in Enniskillen, Co Fermanagh, ahead of the G8 summit in Northern Ireland. 13/06/2013 Stock Photo - Alamy
![Darren Kitchen on X: "Proper people of the European Economic Area, my friend is intrigued by this mysterious Guinness number. Help? http://t.co/lsdEmE8xuD" / X Darren Kitchen on X: "Proper people of the European Economic Area, my friend is intrigued by this mysterious Guinness number. Help? http://t.co/lsdEmE8xuD" / X](https://pbs.twimg.com/media/BxtWCFLCEAE5AG6.jpg)