It's actually made from the aluminum favor tins you can get at AC Moore and Michaels. They come in a pack of 25 tins and with a 50% off coupon, they were just $10.
In fact, this could be considered a Cricut-less project. While I did use mine, all you really need is a 1 3/4 inch circle punch and number stickers. I used four different patterns of paper that came in one of the holiday stacks I bought recently. Then, I cut six 1 3/4 inch circles from each pattern of paper.
I cut the number using Plantin Schoolbook and then attached them to the circles and then the circles onto the lid of the favor tin. The only thing left to do was attach a magnet using a hot glue gun.
We filled the tins with M&M's and put them on the refrigerator in the shape of the tree. All in all, it was a pretty simple project and we can use it year after year.