Organize the Bathroom for Under $20 - 150 Dollar Store Organizing Ideas and Projects for the Entire Home
You'd be amazed at how much stuff you can fit into a really narrow cabinet. This particular one wins out over other narrow bathroom cabinets because it has drawers, so you don't have to pull the whole cabinet out every time you want something. I had something similar that I used for years — it tucked neatly in beside the toilet in the tiny bathrooms of four or five different apartments. Bathroom cabinet, $119 from Amazon.