Yeah they're basic, over-the-counter no-spill mugs, generally for use on boats.

@The_Picard_Maneuver @Norgur they're driving mugs!!!! Similar: https://www.etsy.com/listing/1411627248/vintage-80s-auto-car-coffee-travel-no

I think a good head cannon for this is that a mug is such a basic thing that you don't really need to keep re-inventing a new design from scratch. So when a new replicator system/technology comes out, you just port stuff over from the old one. Like maybe it's one of those patterns in the replicator database that just goes back eons to united earth or something.

I bought one and have it at my office. It's a fine mug.

Yep. I laughed when one of those showed up like it was the cup of the future when I literally used one every day during my morning commute in the 20th century.

That style of mug became popular in the 80s, when corporate commuting and cubicle culture exploded, and cars didn't all come standard with cupholders yet. A mug like this could sit on the dash or console with stability, and it was also good for a crowded desk because you couldn't knock it over and spill it.