Below are some photos of a box that I am using for my travel paint storage box. I took a small piece of wood, cut 2 slits in it and then glued it to the bottom and side of the metal
How to Organize Paint Supplies - Savvy Apron
Organized Paint Storage Closet Ideas - Bless'er House
Store and organize your small arts and crafts supplies. Such as paint bottles, tubes or bottles of acrylics, oils, stains, pigments, paints pens etc. Its dimension is 6.3 x 13.5 x 3.5 inch. 21 separate compartments with 1.7 in opening. Made of 5mm thick PVC foam board, durable and lightweight, waterproof and anti-corrosion, easy to clean. Quickly and easily see all of your supplies at once. You can arrange them side by side to organize more supplies and save space.
Sanfurney Paint Storage Tray, 21 Compartment Arts and Crafts Supply Storage Paint Organization
DIY Craft Paint Storage Rack from scrap wood and wire shelves
Sleek acrylic paint organizer stores up to 48 bottles with staircase design Polished acrylic finish and choice of elegant screws for modern look Fits 2oz bottles, miniatures, acrylic and oil paint tubes 3 compartments neatly organize and separate paintbrushes Space-saving design is perfect for crafters, artists, hobby painters Made in USA - premium quality unlike flimsy imitations p Get Organized. Save Space. Relax and Paint.
JKB Concepts Acrylic Paint Organizer and Paint Brush Holder. 6 Brush options Pewter
Hobby Storage - Dropper Bottle Racks Acrylic Paint Holders for Peg Board
Acrylic Paint Bottle Holder
Craft Paint Rack, Paint Storage, Arts and Crafts, Acrylic Paint Storage, Artist Paint Storage, Water Color Supplies, Craft Room Supplies,
15 Useful Hobby Paint Storage Racks and Organizers - Tangible Day
DIY Paint Storage : r/minipainting