My gap is "Using space under the bathtub efficently" + making it look nice
Why would I want to do that?
4.2 To save time
4.1 To feel better when you enter a clean bathroom.
*3.1 To make a bathroom look neat and tidy.
3.2 To be able to find what you want quickly
*2.1 To hide things (like shampoos, shower gels, candles, aroma salt etc.) which are on the bathtub or near it
2. To organise things better
1. To save space