1. Decomposition by needs:

The latent needs of the users are to be able to open and close the doors easily and while relaxing in the bathtub to be able to read a book

Here is my sketch solving this problem: 

Problem 1: open the doors easily                                                                        

Solution1.: normal doors                                                                                   

Solution2: opened with a hand (pushing the door)

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Problem2: Use a desk for reading in the bathroom

Solution1: The reading desk is integrated in the door

Solution combination: Solution1+ it has a book holder

 

2. TEN CONCEPTS 

All variants include some installed bulbs in order to see what is inside the drawers

All variants have some holes for ventilation 

A) the doors are sliding to the right and to the left. One door is not sliding but can be opened from the bottom and lifted to be put on the bathtub to read. Inside there are some shelves clicked to the bathtub. Plus there is an easy removable box for dirty clothes 

B) The door are opened by pushing a door with a hand and the is a door which can be converted into a reading desk

C) There are normal doors.Inside there are some shelves which are attached to the doors + magnet towel holders

D)The doors are opened with the touch of a hand. There is a hole in the construction to put a reading desk. Shelves are integrated in the doors

E) There are normal doors and there are integrated shelves. There is a lot of space to put dirty clothes or any other things. The door is convertable into a reading desk

F) The doors are opened with a touch of a hand (towards you). There is an inside rectangular place to put a book in and close it. There is a long rectangular box with shelves which is going up(due to the mechanism under it) when you open it. The reading desk has a book holder

 

G) The are some integrated pockets which can be closed/opeed easily.You can put there small things such as shampoos/showel gels..

There are drawers which are open with a touch of a hand. There are some shelves attached to doors. One door is converted into a reading desk.

H) The doors on the bottom are opened with a touch of a hand. The doors on the top are sliding up. All doors have shelves attached. It has a reading desk too

I) this variant  is for those who have a low budget and can be constructed without any special skills. The doors are made of plastic and they are sliding to the right and to the left.There are some bottles which are put into a magnetic rings and directly clicket to the bathtub.Same with the towel holder

J) The doors are open by pulling the hand of the door. There are some integrated shelves on the doors