PetMate Mason Jar Pet Food Storage Containers are pet food containers inspired by the popular glass Mason Jars. Made of plastic, Mason Jar Pet Food Storage Containers feature a rubber-sealed lid to keep food fresh, a durable plastic lid made with an easy grip, and a smoke gray colored Extrusion Blow Molded bottle. The bottle has a light tint to it, so you can see when the food needs to be refilled. Mason Jar Pet Food Storage Containers also have a square design for efficient storage and easy stacking. Made in the USA.