> pub glasses are manufactured to indicate their age I was first confused by this because here in France we have this popular practice, mainly at the school ca

> pub glasses are manufactured to indicate their age I was first confused by this because here in France we have this popular practice, mainly at the school cafeteria, to look at the bottom of our glass to know how old we are (actually it's the mold number obviously...) and depending of the people, the younger (or the older) gets to fetch water for everyone else during lunch. https://eu.duralex.com/en/blogs/inspirations/et-toi-tu-as-quel-age https://eu.duralex.com/en/blogs/inspirations/et-toi-tu-as-qu...