I've got to give credit for this recipe to "The King of Random" and his awesome YouTube channel that features cool science experiments and life hacks. I was able to use his experiment for the Self Freezing Soda with a nice tasty bottle of flavored sparkling water for a refreshing Paleo Slushie. Here is the video that inspired me:
Because every freezer is different, it took me a few tries to find just the right amount of time to keep my bottle in the freezer, so a little trial and error may be in order for you. But, it is totally possible to do this!
I grabbed a few bottles of sparkling water that were no sugar added (the only other ingredient is natural flavor) and shook them up vigorously:
Then I dropped it in the freezer and took about 2hrs 45min to get to the right temperature:
Then I carefully opened the cap to release the pressure, closed the cap tightly, and turned the bottle over a few times to begin the chain reaction of freezing: