Use moisture-resistant wood or PVC boards, sturdy brackets, and wall anchors. Measure and level the shelves before securing them to studs or tile with appropriate drill bits and screws. Seal wood shelves with waterproof paint or varnish.

Install hooks on the back of the door or wall, use a ladder-style rack, or mount a towel bar above the toilet. Rolling carts with towel bars or over-the-door hangers are also space-saving options.

Install floating shelves, over-the-toilet cabinets, or woven baskets. Repurpose old crates or mason jars for toiletries and add peel-and-stick hooks for robes/towels.