Interesting amber glassware - old, new, somewhere in between?

Hello everyone!
I found these lovely amber glasses (?) yesterday, but I'm struggling to find information or something similar to compare them too.
They are 4" tall, the top 'cup' part is 3.5"across. The bottoms are a heavy solid glass, with some imperfections, ridges and bubbles inside. The top is a much more delicate amber colour with a nice ring to it, and there is some discrepancy between the thicknesses among the 5 glasses (I tried to show this in the overhead shot)
Any help/insight would be appreciated!

 

looks like vintage 60's bar ware..

 

Seems to me to be mid-century and good quality.
Maybe if you get an answer, I'll get one as well.

 

As a WAG I would check Holmgaard.

 

Thanks for the suggestion, they do look similar to their Princess line, but without the signature bubble in the stem. Maybe the source of inspiration?
Thanks again for the lead!

 

If I find anything I will let you know, yours are the only similar thing I've seen so far! What do you use them for? They're an odd shape/size

 

I had them when I was buying and selling, and since they didn't sell, I re-donated them. Too bad, I'd have liked to hang on to them, but had to keep things moving.