Sterilite 72620024 Blue Stacking/Nesting Ice Cube Trays 2 Count This is a Set of 2 Stacking/Nesting Ice Cube Trays. These trays are designed to channel water so the trays fill quickly and evenly. When not in use, these trays sit tightly together for efficient storage. Trays stack securely in the freezer when filled with water. Ice cube trays are dishwasher safe, as well as BPA-free and phthalate-free.