I received the No-Spill Ice Cube Tray less than a month ago. Its premise is that a silicone sheet over the top of a filled tray will keep the water from spilling out if the tray is stored on a slight angle. I didn’t even try to put it in my freezer at an angle because the water leaked out when held over my sink — didn’t want that mess. I will use it stored flat, though, as the silicon sheet allows one to stack other items on top of the cubes and may help keep cubes from picking up oders if your fridge has an unfortunate problem.