How To Get A Suction Cup To Stick To Shower Wall What Other Options Are There For Shower Storage Besides Suction Cup Shelves?

What other options are there for shower storage besides suction cup shelves? - how to get a suction cup to stick to shower wall

We used a smooth sides do not have a shower and shower texture, are not liable fools not here.
They are not, and I'm sure it will not happen.

So what are other options the stick?