Tractor Supply has food grade buckets.
^^^^^^^^^^^This guy may or may not have frosted a few “donuts” in his day^^^^^^^^^^^^
For the economy-minded, I see food grade 35 and 55 gallon drums on FB Marketplace regularly.
If he is putting food packages into a container, does it still need to be food-grade? I would think something like cans of tuna fish would be fine if stored in a Home Depot bucket. Even if it is Mylar sealed bags it should be fine without being a food-grade bucket, right?