Letter Baking Trays

I'm thinking I should probably own these letter and number baking trays. From their website: "Oven-safe to 572ºF and (-58ºF). Cool to the touch within minutes after baking. Make ice, Jello, butter, chocolate, cookies, muffins, etc... Food cooks and browns evenly. Trays won't retain odors or flavors, and are dishwasher safe. For storing, they fold or bend to fit anywhere."

See. I'm sold. I'm thinking it would be fun to make letter treats for preschool. Or for some sort of alphabet party. Or just for fun.