I have the ice cube tray. I stuck a meeple into it and it fits perfectly. I haven't tried putting it in the oven, but silicone is stable from -55 Celsius to +300 Celsius (572 Fahrenheit), so it should be fine. If you're going to try making cookies in it, you'll need to make sugar cookies or shortbread, which don't change size during baking. I'll stick to using the cookie cutters.