When I was a young un, KitKats, Aeros, and all chocolate bars came in thin aluminium foil and a very thin paper wrapper, just like your KitKat pic. Foil was usu

When I was a young un, KitKats, Aeros, and all chocolate bars came in thin aluminium foil and a very thin paper wrapper, just like your KitKat pic. Foil was usually colour coded by flavour. 100% recyclable, even in the 70s. Mars bars, Crunchies, and other bars were wrapped in greaseproof paper folded envelope style and sealed with gum. They were the right shape and weight for small paper aeroplanes for annoying teachers. :) There was a selection of playground origami models traditional for the various other size sweetie and choc wrappers that were mainly greaseproof or waxed paper.