I am always trying to find an ice cube tray that doesn’t spill and doesn’t collect some of the stale smells of the freezer. The cover does a great job on both these counts. Instructions are needed the first time, but after that it’s second nature to fill and press the lid down. Cubes pop out easily and don’t fly across the room. Sturdy plastic that stacks well and doesn’t spill! [This review was collected as part of a promotion.]