We have a little kitchenette at my office, but it sorely lacks places for storing sponges, rags, brushes. . . so I designed this stand so the bottle brush would not have to hang over the edge of the sink to dry.

When I sliced it, I added a few solid layers at about 2.25in / 60mm and used a 15% grid infill for the entire thing. Then I added steel shot and epoxy to weigh the base down and keep it from tipping over. You can use sand, and it will work the same, just a bit lighter.

Then I added a layer of 1/8in / 3mm adhesive backed neoprene foam to the bottom of it to keep it from sliding around.

This is the bottle brush I designed the stand for. There may be others it works with.

https://www.dawnkitchen.com/dawn-twister-bottle-brush.html