Need an alternative to "long-term food storage in plastic buckets".
I'm in Mumbai, India.
I spoke to a few people from the U.S. who do survival things and one had spent his life in long-term food storage. I wanted to this too. He explained me very clearly how to store food-grains long-term.
What I was told is to get some big food-grade plastic buckets with air-tight lids and put the grains and a calculated amount of dry ice on top of the grains using newspaper. Then, put the lid on and after sometime, check if there is any expansion or change in the bucket and if the dry ice is evaporated. Then seal the lid tightly.
But, my main problem is getting plastic sealed buckets here in India. I have tried a few malls, bakeries, shops and even online but can't find air-tight buckets or big containers larger than one liter capacity. I was able to find dry ice, though.
Can anyone tell me an alternative to air-tight buckets that I can use?