I was born in 1967 and I still say “tin foil.” Probably imitating my parents because there was “tin foil” before the aluminum kind that we all take for granted. I haven’t researched the history but I’m guessing that’s why.
My dad called it “tin foil” and my mom called it “aluminum foil.” So, I come from a mixed family. 😄
I think my dad called it “tin foil” just to bug my mom. They truly were best friends.