Kewpie Mayonnaise, made in Japan, has extra egg yolk and MSG in it, making it far superior to any other commercially-made mayonnaise. My family loves the Kewpie. To make it easier to squeeze out of the bottle, I 3D printed a thing you can attach to the cap so you can invert the bottle and let the mayo settle near the spout. Now we don't have to shake the bottle to get the mayo out.
If you want to print one of your own, here's the STL file.