If you do not have a created-in niche but do have a sizable walk-in shower, think about hanging floating shelves around the shower wall, like this roomy bathroom from Louis Duncan-He Designs. You usually takes those fairly clear storage bins to the next stage by adding printable labels like these https://claytonrjbqf.nizarblog.com/31605566/examine-this-report-on-bathroom-storage-ideas-2024