Mmmmm......Slushy

There's this thing I can sometimes do with bottled water. If I allow it to freeze without moving it, sometimes it becomes hyper-frozen, where it's still a liquid but below the temperature of freezing.

Then, you shake the bottle and it instantly freezes, only not the crystalline structure of ice, but more of a slushy consistency. This form of ice lasts for a considerable time, and seems to almost have a taste independent of water. It's really hard to describe.

There's only about a 10 minute window that this will work: after that the water goes the way of most ice. If you like freezing your water bottles to have cold water, try it and see if you can reproduce the effect.