These appear to be part of a bar set. The link shows some cocktail shakers and glass sets that are also marked DRGM (Germany)

[URL removed]

You look like you have two different sizes/shapes. They look like liquer and/or wine glasses to me.

I would think they are stainless steel. Look quite modern/industrial – 1970s/80s

These would be for a travelling case then. Then telescoping stem tells me that. They would have come in likely a leather case. Search for travel case bar ware.

Thanks Lynne for your help

They are all the same size, they collapse down, the picture shows them in all the stages they do. I thought about them being some kind of liquor cup, but I cant find anything like them

[URL removed] The marking on them is DRGM Germany, The stems on these cups collapse down, approx 3 inch fully strecthed out and 2 inches when collapsed

[URL removed] Thanks all for the responses, muchly appreciated
JohnGermaine, the only markings on these are D.R.G.M on one side and Germany on the other, no other markings on it :)

Your picture covers part of the info you posted. I can see in one of the pictures a part of a possible name brand. These are very cool and as I recall telescoping glasses came on the scene in the late 50s and early 60s. If you can post that name brand, maybe someone will something about them.

They are way cool!

[URL removed] I can just barely see something written besides the DRMG up near the stem in the last picture. That is what I was referring to. The last 2 letters look like “er”.

They are (or were) part of a larger travel set that generally included a flask as well. Used for brandy or schnapps to bolster a tired traveler’s flagging “spirits” (sorry, couldn’t help the pun).