This product is completely silly, and that's exactly the appeal. There have been ice cube trays in varying shapes before but these go several steps beyond that. There are two sets: a three-piece letter tray set that contains all the letters in brightly colored silicone, and a number set. Made from high-gloss FDA-tested silicone, they are flexible, nonstick and oven-safe to 572º F; and like other silicone products, they are cool to the touch within minutes after baking. They bake evenly, won't retain odors or flavors, and they are easy to store since you can fold them up, and you can also throw them in the dishwasher. So in addition to making ice cubes in the shape of letters or numbers, you can bake with them or fill them with chocolate, Jello, or butter. The possibilities are endless. My grandson and I made colorful ice cubes so he could spell out his name in a glass, and we filled others with chocolate. They are great fun for kids, but can also add decoration to adult parties as well by spelling out the guest of honor's name, and so on. For more information, call 877-SillyCone (745-5926) or e-mail info@sillycone.us.