Illustrate me a prototype for a shower feet scrubber

I'm looking for someone to develop me a prototype of a shower feet scrubber that cleans feet. At this stage there is only 2 that I've seen made. I'm wanting to include a massage feature as well as a scrubbing feature. Adding an increased sole in the middle so you get a deeper, comfier clean. Another issue I was thinking would be mould getting in between the bristles. They offer a option where you can hang it up so the water drips down but if there's is another solution that would be great. It has suction cups underneath which is great. I'll add a photo down below to show you what I'm talking about. I've already found a manufacture that can customise the same type of product. Thank you.