Put your smaller container in the middle and put something inside the small container to weight it down. Your small container will probably shift off to the side if you don't weigh it down.
You can see in this picture we chose to use a bag of split peas. I should share with you that if you choose peas or beans of any sort and then accidentally drop your ice candle while it's in the freezer, there is a good chance your bag will crash and break and the bottom of your chest freezer will be covered in dried peas.
Now you will need something to keep your middle container from popping up. Mr. Steady used lots and lots of tape. If your large container has a lid - that is the best. After I made this I remembered I still had the lid. Oops.
Now, just freeze until it's frozen solid. When you're ready to use, add some warm water to the middle container to loosen it. Add a candle in a container (I like to use a pillar candle in a canning jar) and set outside on your front porch.
I am going to keep my eyes open for containers and maybe do a trio of smaller containers soon.