The Vittles Vault Outback Airtight Plastic Dry Pet Food Storage Container for Dogs Gray 50 Pound Capacity Collection offers world-class freshness. Lock in freshness & lock everything else out with our Airtight sealing system & thoughtfully constructed angles that make it extra tough for anything from the outside to get in. Made of heavy duty food grade plastic & with an easy opening lid they are completely airtight to keep freshness in.