Have you considered offering shower soaps in a more economical way? Speeds up guest turn-over. Less waste.
Installation is simple, no screws or holes in your tile. This comes with a quality adhesive system and the chambers are lockable. (Follow installation directions carefully to ensure proper adhesion)
Easy to wipe down and keep clean. Easy to refill. Once installed then you can buy soap in bulk at a fraction of the cost. FYI we sell 5L liquid soaps!
Be sure to prime it BEFORE your guests arrive. As this takes awhile, particularly with thicker conditioners.