Have you ever been taking a shower only to find out your soap bar is used up?
Leaving you to either use your shampoo as a make shift soap or climb out of the shower soaking wet to get a replacement (or yell for a significant other to fetch a replacement)

Well maybe thats just me but the solution for us was to design a spare soap holder.

Designed for glass shower stalls. You simply clamp it to the top of your glass. Designed in 3 pieces. the soap holder, a mounting clamp and a plastic pin to lock the first 2 pieces together.