You can lay it/place it at pretty much any angle (except vertical) and it won't leak. Just fill it with water, slide the silicone lid across the top, pour off the excess water by holding the tray at a slight angle, and put away to freeze. LOVE IT!
The blue silicone lid slips on and with the help of water friction or as they call it, "ergonomic grips" prevents water from leaking. It's awesome!! I hope it lasts the test of time, but so far, it's been great!!
Slight twist of the tray is all you need to release the ice.
YAY FOR ICE!!