I performed a very unscientific experiment today. I took a can of Coke Zero that started at room temperature with me to Rapid City. The temperature outside was around -10 degrees F. Wind chills around-20 degrees F. I left Sturgis for Rapid at 1:50 p.m. I drove for 25 minutes. I stopped at five stores for a total of 2 hours 15 minutes. The other 30 minutes was spent driving to get to the stores. By the time I left Rapid at 5:00 to come home, my Coke Zero was more than sufficiently chilled.
By the way, the wind chills will top out at -50 degrees F tonight.