This small tub is designed to fit into most makeup carrying cases and makes cleaning brushes easy. A porous rubbing screen on a riser allows makeup and debris to fall to the bottom of the canister, away from the brush. Cleaning your canister is easy. All of the parts come out and can be wiped clean with a paper towel or rag ready to be filled and used again. Fill tub only enough to cover 1/4 way up the bristles of your brush. For larger brushes use the lid with a small amount of cleaner and let the capillary action draw the cleaner up into the brush.