Vittles Vault, Airtight Grain Storage, 31 lb capacity

 
The 25 lb rating is for pet food.  According to the manufacturer’s website, this is 6.6 gallons.  That figures to right around 25 liters.  My rule of thumb is 1.25 lbs of grain per liter.  So… this should hold right around 31.25 lbs of grain.
 
These are airtight and FDA approved for food grade storage.