Just place it on the bran floor and the water from the small holes will collect in the bottom of the water soap. Water stain is transparent so you can see the contents clearly and wash them cleanly. Because it is compact, it is perfect for pickling up in the fridge or anywhere you like. Please increase the number of pieces as needed. Material: Polypropylene resin; *Poly-conforming to self-standards regarding polyolefin food containers, such as olefin sanitation council. Size: Width: 1.5 inches (38 mm), Depth: 1.1 inches (27 mm), Height: 3.5 inches (90 mm). Country of manufacture: Aichi Prefecture, Others: Patent No. 6083846.