Ok this sounds nuts but I was just talking to my American next door neighbour who was horrified at the whole idea of squash or cordial. I didn't realise it's just not a thing in the US. She thought it was mad that you put some liquid in the bottom of a glass then fill it with water. They have these gross-sounding super sugary powders instead. Anyway we fell about laughing because she said I'd failed to sell it to her. So do your best
tell an American why Brits give their families orange squash
....go!