Before electricity and modern refrigeration, how did people keep food and ice cold ?

Everyone keeps say a ice box, which is just a box that holds ice. How would they get the ice? If it wasnt winter or very warm outside how are they going to keep the ice without melting? If its the middle of summer and outside is 100+ degrees how is anyone going to be able to have ice without the ice melting? Do... show more Everyone keeps say a ice box, which is just a box that holds ice. How would they get the ice? If it wasnt winter or very warm outside how are they going to keep the ice without melting? If its the middle of summer and outside is 100+ degrees how is anyone going to be able to have ice without the ice melting? Do they just walk over to the arctic and pick up the ice and bring it back? How is the ice NOT going to melt? back in the 17-1800s and earlier how would people keep food cold? If people bought ice from somewhere back then, how did that place keep and ice?

This all sounds WAY too confusing to understand!
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