Keep your animal's dry kibble safe and secure with the IRIS Airtight Pet Food Container Combo. It's made of sturdy plastic and polypropylene for long-term use. This pet food storage container set includes 33 qt and a 12 qt see-through holders that lets you monitor the supply levels at a quick glance. Each one is suitable for holding dry dog and cat kibble, bird seed, treats, rawhide and much more. This set comes with fitted lids with positive-snap latches that let you achieve an airtight seal to prevent moisture, humidity and pests from entering. It's a wonderful way to keep the contents inside fresh and ready for use. The top container is removable for added convenience and the unit includes wheels on the bottom, allowing you to move it from one location to another as needed. This IRIS Airtight Pet Food Container Combo is BPA-free.