I have been storing dried foods in 2lt coke bottles then pumping in nitrogen gas , items been in storage, since 2014 also use 20lt buckets for bulk storage, as there are only 2 of us I try to keep the container sizes reasonable so that not to much open at a time , it is high humidity where I live on the coast in Africa , also use 1lt yoghurt pots anything that i can get , we are in our 70's ,so not always food grade , i rotate the 100 kg of flour ( in 10 kg bags ) have had a few items not sealed right , tin goods i buy in trays of 12 then place the pack into a plastic bag with BB dates on , again these items been down since 2014 , well past Bb date just need to turn the pack over once a year to stop the food in the tins going dark on the top , I store in a reinforced 50 sq m Safe room with a 5000 lt water tank inside ,stays around 25 / 26 c but 80% + humidity ,,everything with added outer plastic bags, I also keep all my reloading items in there as well , different strokes for different folks in different countries:shtf