I just got this idea and tried it. I am new to fountain pens and have some ink bottles that are taller than I would like.
I am a klutz so I tried to figure out how to keep the bottles (ahem, Noodler's, ahem) from tipping over while I was filling them.
I took the box the ink came in and use only one other piece of cardboard to make this pretty stable stand for my Noodler's ink.
It is as simple as cutting the box down a bit, folding over the sides and taping the flaps to a square piece of cardboard.
I have included a graphic and two images of what I came up with. I used duct tape.
Hoping to learn stuff from everyone here.