FOOD GRADE MATERIAL: The sponge box is made of 100% non-toxic BPA-free food grade composite material, which can be directly washed in the dishwasher. LIGHTWEIGHT AND COMPACT: The sponge holder can be neatly installed anywhere in any size sink to store smiley face sponges, so that your sponges don't have to worry about placing them, saving more space. EASY TO INSTALL: Our sponge holder comes with sturdy suction cups that can be attached to clean and smooth surfaces like bathrooms, kitchen sinks, walls and more. Before using the sponge holder, clean the sink and keep it dry. Then, press the sponge storage box against the surface, squeeze out the air to make it firmly fixed, and finally just put the smiley face sponge on the sponge holder. KEEP DRY: The open design of the sponge holder promotes the sponge to drip dry and keeps the sponge dry. Helps eliminate sponge odor and keep sponges dry for a long time. Reduce bad smells and keep your kitchen tidy. STRONG SUCTION CUP: The sponge holder can suck on any clean and smooth surface, such as mirror, steel plate, glass, ceramic tile, stainless steel plate, wood and plastic plate.When using the suction cup, When applying Vaseline to the sink, It has the best adsorption effect.