Explain this scientists

Man of Honour
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29 Mar 2003
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Location
Stoke on Trent
These two identical bottles of Coke were bought yesterday and put in the garage next to each other.
One was complete ice and the other was normal (the picture is about 2 hours later after defrosting).

Why? How?

frozecoke.jpg
 
well, they aren't full - had they been opened? in which case the answer is obvious.

The first one I opened while it was ice and the Mrs told me off for making a mess and the second one was the one I decided to drink out of.
Nothing sinister, just 2 unopened bottles bought at the same time and stored in the same place.
 
The first one I opened while it was ice and the Mrs told me off for making a mess and the second one was the one I decided to drink out of.
Nothing sinister, just 2 unopened bottles bought at the same time and stored in the same place.

then its not that obvious ;)
possibly different batches with slightly different amounts of CO2 or air in.
possibly one was ever so slightly in a colder are than the other.
or maybe a slight difference in the structure of the inside of the plastic bottle which made the formation of an initial seed crystal of ice more likely in one of them - once the first crystal forms the freezing would be rapid (if it was cold enough) - but if crystallisation doesn't start in the other bottle it could quite easily sit there below its freezing point and stay liquid.
 
If you'd tapped on the unfrozen bottle when you first found it, the whole thing would have turned into solid iced coke. It's something to do with super-cooled liquids and the carbonates that get released when you tap the bottle that cause a chain-reaction where ice crystals form, or it might be just magic.
 
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