During the recent cold snap I noticed something strange about my shampoo:
The white patches are where the shampoo's frozen! They're not quite solid, but they're definitely significantly firmer than usual. I think the pattern they make looks really cool :-) However, a few days later when the whole bottle had turned white, I realised I needed to keep my shampoo somewhere warmer for the duration. Solid shampoo is a lot harder to get out of a squeezy bottle than the liquid kind!