Well MrSix, while I am not sure myself how much I believe or disbelieve, I would imagine that in the case of a poleshift, given enough time for our "normal" resources to run out, such things as packaging will become extremely important in general survival. Imagine the advantage you have with weather protection etc. with water mostly-impremeable plastics. If you are going to be traveling you will want to "pack" things and possibly preserve certain types of foods. Carrying water will be an issue as well. If anything it is a fun thought exercise. Have a good day
- Aj
