Blank Christmas Tree Silicone Freshie Mold

When it bakes it bows out. I tried different methods such as more bead, less beads, lower temp, and having it raised on something while baking and cooling. The only thing I can attribute it to is that the bottom is a lot thinner material then the sides not allowing very much to ability for the beans or it could be the cardstock inserts drawing of the beads a little bit My 4 inch square mold also does the same thing. But they still look cute and I was very impressed with the cardstock quality. I was still use them and try to perfect it more.