Help identifying vintage handblown glass mugs - possibly continental Europe?

Hello. I have a set of 6 near identical glass mugs. They are actually quite small just under 10 cm (4 inches). They have a very distinctive appearance with a large looping handle and a ridge across the middle of the mug. They are clearly handblown; having a very prominent "pontil" mark at the base. The handle reminds of Continental (porcelain) cups that I have seen in the past. Has anyone seen anything like these mugs? I am extremely helpful for any advice. Best wishes,
James

 

How do you know they're vintage?

Debora

 

Thanks for your question. I should have said that they have been in the family for (I would guess) at least 20 years, although it could have been much longer ago because they belonged to a relative who is now dead. This relative was buying things between the 1950s and the 1980s, although it is possible that they were given as a gift as late as the 2000s.

Best wishes,
James

 

And in what part of the world? (I ask because this is an international forum.)

Debora

 

The lady that probably bought these lived in the UK, but travelled widely in Western Europe and USA/Canada (between the 1950s and 1980s). I said that it seemed European in style to me. But perhaps it could have been made by an art glass studio in the UK?

Best wishes,
James

 

They look like custard cups.

 

Irish coffee maybe?

Debora