Those are 4L bottles not gallon bottles
a gallon only has 3.758 liters in it.
The one bottle could of had some air in it allowing it to expand and freeze. Pop the top on one of the others and see it it will freeze as soon as it is opened. We leave our pop in the garage and with how cold it is as soon as I open one it starts to freeze.
Always missed, Never forgotten
08' 4door JK 5.7 hemi, auto and atlas
2012 F350 6.7 PSD CC shortbox