Pre-fabricated shampoo niches are made by Tile Redi, Noble Niche, and others. I haven't used either product so this is not an endorsement.
Minimizing the clutter of bottles is a good thing, particularly if everyone has their own special product.
Traditionally these niches are hand fabricated on-site by the installer or a ceramic soap dish can be used. The ceramic soap dish is usually too small for anything beyond soap and it can be kind of clunky visually.
Now there are prefabricated units that can be recessed into the wall and the ceramic tile can be installed over it to form a continuous tile surface of the same material. Theoretically this should have a better waterproof seal as there are fewer exposed joints. I wonder if there is even a better way to hide the clutter?