Aluminum foil replaced tin foil shortly after World War II.
Tin cans have never been made out of pure tin, they have always been made out of steel that has been coated with tin to prevent corrosion.
Steel and tin cans - Wikipedia
Last but not least, the tin foil hat "can be traced back in a very weird and prescient short story written in 1927 by Julian Huxley, brother of the better-known author Aldous and half-brother to Nobel laureate Andrew"[3] titled The Tissue-Culture King, wherein the main character uses a metal hat to prevent being mind controlled by the villain scientist.[4][5] "
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