We had no plastic in the fifties and no tin foil either. The boys in our 'gang' used old fallen branches and twigs to make the fire.

We girls did the baking and serving (on a leaf!) No Women's Lib in those days.

Sometimes someone had a glass bottle of Tizer,but mostly we drank water from the stream, which we regularly dammed for a bit of a swim/paddle.

The naughty boys loved to horrify us by weeing on the fire to put it out afterwards.

You're right though Steve. I read recently that we all now have bits of plastic in our bodies, ingested in various ways. Not a nice thought.