Durability & Strong Suction: Comes with patened suction cup. The suction cup based on the bionics octopus sucker principle is made of TPE material, which hold up to 11 lbs. The sponge holder for kitchen sink and the sucker are water resistant so they can be used in wet areas such as sink for many years 1 Second Installation & Removable: Simply press down the suction cup to squeeze the air out, they will stick to the wall firmly. You can finish the installation in 1 second. No screws, no nails, no glue, no tools. The kitchen sink caddy can be re-positioned many times and removed without leaving residues (If problems when firstly installation, wash suction cup with warm water and try to install on the dry and clean sink after it is dried with a hair dryer. If the suction cup does not fall, there is no problem and the installation site needs to be changed.) Rustproof & Fast Draining: Made of aluminum finished in rustproof coating which not only prevents rust but also stands up to times. With all-around drainage design, the sponge caddy has maximum air ventilation and fully dripes water away. Keep your kitchen tools air dry quickly and clean Space Saving & Keep tidy: Measures 5.3" x 2.1" x 2.6" and creat sink storage in compact spaces. Holds Sponge, Scrubber, Scouring Pad, Drain Stopper, And More! Great for Kitchen sink or ceramic tile wall Warm Tips: In order to ensure that the suction cups are effective, please ensure that the mounting surface is clean and dry before mounting. The dish sponge holder is ONLY stick on smooth, non-porous surfaces like metal, glass, tile, stainless steel and acrylic but NOT apply to uneven tiles, texture plate, unfinished marble, wallpaper, painted wall, etc.