High quality material: this baby bottle storage bag is made of high quality plastic, and easy to clean, and can be cleaned with mild soap and water; But please don't put it in the dishwasher. Easy-to-grasp side handles easy to transport from table to table; Make easier, the feet at the bottom of each storage box can be stacked to create a space-saving vertical storage space, and multiple storage spaces can be used to create a customized storage system that can be stacked side by side or used.