My older house is a dust magnet for anything left out in the open. I’ve been using this plastic 3-drawer container for my brushes, fo keep them clean, and I like storing them flat. It’s not the prettiest, but keeps my brushes clean. I have my eye brushes in one drawer, face brushes in another, and brushes I only use once in awhile in the third. Brushes fit perfectly. Less than $5 at Walmart. (Photo is Walmart’s.)