Ice Cube Trays, Easy-Release Silicone & Flexible 15-Ice Cube Trays With Spill-Resistant Removable Lid, BPA Free, For Cocktail, Freezer, Stackable Ice Trays With Cover. Easy to Use: Pour the liquid into the ice tray for freezer for 4-6 hours. Each grid of ice tray is an independent individual, and there is a water level line on the edge of each grid to prevent too much water, which is more conducive to the separation of ice cubes.