I have the definitive answer to the OP's question. I found emergency kits for sale in my local big box store - bright red backpacks - one for two people and a larger one for four people. The smaller weighed 4.337 pounds and the larger weighed 8.674 pounds. I am sure the packs contained everything one could possibly need for any emergency, otherwise it would have been unethical to sell them to the public, and who would do that?

You may be able to recognize the abundant sarcasm in this post