Spool "Shoes" - A Simplistic Spool Holder

Spool ShoesI had a simple problem: My spools are kept in a shelf inside a cabinet, but every time I open my cabinet, they tend to roll out. So the solution is simple, I made these holders that give the spools a flat edge so they don't roll out. They kind of look like shoes, so that's why I call them spool shoes. They are a remake of a spool holder I made for myself two years ago, but that had issues with adhesion and warping, which is why this version has a wider base to help address those concerns. Warning: Due to its long base, it is best to print this with a brim, as it will warp slightly.