Calorimetry and Coke - Perfect Together

Okay.  Science experiment update.  It has not broken freezing in Philadelphia since we left a 2 liter bottle of coke on the back porch accidentally on Saturday morning.  The 2 liter bottle of SPrite and the quart of tonic were frozen solid as of Sunday.  As of Monday morning, the Coke was showing now signs of freezing.  Monday night -- just the same.  Tuesday morning, not even slush.  

This is really concerning me.  Why is it that regular Coke seems unable to freeze?  Any scientists want to comment.

On another front, I'm in day two at MUC with Mom and Dad.  We're waiting for an anti-clotting drug.  So, yesterday I got bored and after I finished the work I needed to do, I cast on my version of Calorimetry  with some Classic Elite Inca Alpaca I bought when Norma when she had a destashing sale.  When Mom and Dad came up from Florida, she didn't have anything to wear on her head.  She hates hats.  So I cast on the Inca Alpaca and the results are below.

We had a bit of a to-do over the button, but I won.  Completed in one afternoon at the hospital.  At some point, those poor Broad Street Mittens will be done.  

The Real Thing?

Saturday morning we pulled a 2 liter bottle of Coke out of a cooler and inadvertently left it out on the back porch.  It's been cold here.  Also left outside were a bottle of Sprite (2 liter) and a quart of tonic.  By Noon on Sunday, when it was fairly cold here in Philly, the Sprite was frozen half way through, the tonic was frozen solid and the Coke had no signs of freezing.

This morning, still way below freezing here -- the Coke was completely liquid.  I find that both disturbing and interesting.  Why is it that Coke won't freeze?  Anyone know?