When you squirt toothpaste how has it got neat coloured stripes on it? Surely in the tube it would all get mushed up?
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It does not all get mashed up in the tube. The tooth paste tube is filled with these stripes in the tube. When you squeze the toothpaste out it does not move that far in relation to each other so it still comes out striped. If you look close there is a tiny bit of unevenness where the toothpast have started to slowly mix but it is not much.
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