Store in the refrigerator to keep the caramel firm (seriously though--otherwise, they will melt!). Remove from the refrigerator about 20 minutes before you are ready to serve and slice with a knife.
The hardest part about preparing these caramels is not eating all of them in one sitting! They are really such a treat.
These caramels would make a great gift for a vegan, dairy free or dairy consuming friend. I would suggest wrapping them up in little strips of parchment paper.