FOOD GRADE MATERIAL:Our dog food storages are made of high-density polyethylene plastic for direct contact with food. The folding part is made of silicone and can be folded over and over again.FOLDABLE DESIGN SAVES SPACE:This container is a foldable design that allows for great storage space savings. Holds 35lbs before folding and 13lbs after folding.SUPERB SEALING: The food containers come with 4 side locking lids and silicone gaskets to keep food fresh by sealing them. There is also a desiccant slot on the inside of the lid, which keeps out moisture and all bugs.SUPER EASY TO USE: The rice storage container with rollers allows you to easily move it anywhere, even if the whole bucket is full. It also comes with a measuring cylinder, making it super easy to use.MULTI-FUNCTIONAL FOOD STORAGE BOX:Health is paramount with this rice storage container, which is also suitable for storing food for dogs, cats and birds. Examples include cereals, flour, snacks, nuts and baking supplies.