I was inspired by this: https://www.thingiverse.com/thing:2657612
but I wanted a single space with no separators for having more space.
So, i started by this: https://www.thingiverse.com/thing:2058973 and I added a space inside with 3 holes for water draining

Obviously you can use it to hold what do you want (office supplies, tools, ecc)

Supports are required, I recommend to use brim due the little surface that rests on the plate