I had always wondered the same thing about these cups

My theory is that the cup is regular on the inside and the bottom is weighted to provide stability. It's raktajino. It's Klingon. So if a spontaneous heroic fight erupts around you, you want to

Use the cup as a weapon
Swipe the cup out of the way without it toppling over so you can toast on your glorious victory in the battle of the breakfast.

Fun fact: these were actually real cups you could buy (they picked them because of how weird they were), so there are likely unsuspecting people out there using them still today. They don't know that they're prepared for a battle at any moment.
- Yeah they're basic, over-the-counter no-spill mugs, generally for use on boats.
- @ThePicardManeuver @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.
Good point, the Peeky Blinders would line the bottom with a razor wheel.

My friend has one of these mugs! We call it the troll mug because the last sip is always bigger than you think and ends up all over you

Maybe it's for a drink that has a lot of sediment or something, there are beers that do that. That's my headcanon

I think it's a nautical design. The wide base keeps it steady on ships. Hence why it's used in Star Trek.
- 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.
They're all just throwing back mugs of beer in the mornings while running the space station.

put your whole mouth around the top and invert it. just like drinking a water bottle.

This is how I drink all beverages from all cups.
I'm great fun at a tiki bar.

The cup is bottom-heavy and usually has a high friction substance on the bottom so that it's less likely to spill when you take an unexpected wave on Earth, or an unexpected photon torpedo on DS9.

Yeah I always thought it was kinda funny that this became "the raktajino cup" when I always took the cup's shape to be a symbol of how DS9 was this ramshackle station "on the frontier". I mean it makes sense that Klingons would want a mug that can resist spillage but when DS9 first aired I never thought it was anything beyond just a robust mug.
On DS9 you always expect photon torpedos.

I had a crush on her as a kid

She's still smoking hot