The best way to store these cakesicles is allow them to cool completely, then store them in individual bags in an airtight container in the fridge. They will keep quite well for up to 7-10 days in the fridge. The cakesicles will store if individually wrapped in the freezer for up to 3 months. You may notice a bit of "wet" looking drops on the chocolate after a bit of time in the fridge or freezer as they are thawed to room temperature, which may cause some ingredients to bleed.