I made these myself, and they're finely crafted, beautiful glass pieces made with resin. There may be some burrs on the cut edges and some bubbles in the silicone, but they don't affect the finished product, and I was able to create pieces like the ones in the photos. The selling point is that they're made with tested, food-grade, harmless, and safe silicone made in Japan, instead of inexpensive, potentially harmful silicone molds. You can even use them for chocolate and gummy candies! Recommended for those who make fake food.