Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Will these work on a rough textured ceramic tile bathroom shower wall?
Document: I've used these on ceramic tile and the textured surface of a refrigerator to handle utensils, a small skillet, etc. No damage to the tiles and the suction cups have been in place for about a year. I reordered more.
These actually work as intended, in a shower stall used every day, fastening a soap holder against only semi-smooth ceramic tile. They are better than I've seen anywhere. No regrets.
I ordered this product because all other suction cups that I have used have failed. These work perfectly on my textured shower tile and all my shower items are secure. Other suction cups always came loose when exposed to water, these are holding firm. Frogsfeet Rock! !
Seem to work okay in guest bathroom with fiberglass shower walls but failed miserably where I really needed it in master bath. Tried it on stone and non porous tile..failed both places. Also worth noting there is a disclaimer warning on package that products used to make this may be cancer causing.
So typical problem with suction cups is the suction. These suction cups come with adhesive gel stuck along the edge (see blue line in the image) that provide excellent bonding with the surface, unlike other suction cups. When I put it on bathroom wall, and then wanted to re-adjust it, I realized that it leaves behind some of that sticky gel on the tile. My guess is that they are good for few pull backs.
Amazing but the other reviews are accurate. Put this in my shower to hold a long handle brush. The tile is an uneven textured sort of surface. Cleaned it well with rubbing alcohol, followed the directions to mount the hook and, wow, it's on there ! Impressive.Only had it mounted a few days but it sure seems solid. Will report back if it fails anytime soon.
Initially, I thought these were great. It takes a little effort to get them to stick well, but then they hold well on glass. There seems to be some variation in quality however. I have a couple that are sticking pretty well to the textured tile in my shower, but a third just won't stick to the tile at all. It's on glass and holding pretty well.Another negative is they leave marks that are near impossible to remove.
These suction cups are awesome! We have a toy bin for our bathtub, which suctions to tile, and regulars cups would only hold for a few weeks, at best. Every time we heard a crashing sound from the bathroom we knew what had happened. After installing the Frogs feet cups the toy bin has been hanging there securely now for over two months. Loves these. They really work!
Love it!!! The best ones I've ever used! Our wall tiles have rough surface but they stay on good! Perfect way for us to hang our loofas in the shower place!
I have been using these in my bathroom for a few months now to hold up a shower brush and foot scrubber. At first I tried sticking the suction cups to the tile in the bathroom. After a day or two i noticed that the feet would get air in them and then I would hear the stuff come falling down into the tub.I then tried to stick the suction cups on the sliding glass door of the shower and they haven't fallen down or lost suction in about 4 months.
Answer: I have only used on glass but these things are pretty terrific.   My guess is that they probably woukd