The radioactivity is minimal. BUT - if you break the glass or scrape it (for example with cutlery while eating) you can release shards and/or dust which may contain alpha emitters.
Ingesting those is a bad idea, even if the glass is a very weak source.
Side note: turns out that mid-century Fiesta Ware was made with uranium glazes (nice colours...) and it's definitely not 100% safe if broken or chipped.
Even if you ignore the radioactivity, uranium is quite a toxic element in its own right. Glass should be chemically stable under normal use, but glazes definitely aren't.
Ingesting those is a bad idea, even if the glass is a very weak source.
Side note: turns out that mid-century Fiesta Ware was made with uranium glazes (nice colours...) and it's definitely not 100% safe if broken or chipped.
Even if you ignore the radioactivity, uranium is quite a toxic element in its own right. Glass should be chemically stable under normal use, but glazes definitely aren't.