This is a simple print with no supports.  I like it with PETG — Food safe and structural, but I can also accept that it shouldn't matter.

I did this with OpenSCAD.  It's a simple model.  Source included.  You can modify it yourself. Two versions are included — a smaller one — I call it “mustard inverter” because it fits the mustard we buy.  The larger version has some cutouts to help align the bottle.

As you can see … even the large ketchup bottle stands — and even tipping about 30 degrees it “falls” back to upright.