Gridfinity cup with customizable hole grid

A remix of the OpenSCAD Gridfinity cup model that adds a solid floor with a customizable grid of circular holes for holding batteries, screwdrivers, jars, bottles, or anything else cylindrical. The size, number, and spacing of holes can be changed, as well as the depth (by adjusting the solid floor's height), and the hols can be placed on a simple rectangular grid or with staggered alternate rows.