Silicone Ice Cube Trays Are Made Of Foodgrade Silicone, Bpa Safe, Dishwasher Safe. Tiny Grids, Make Quick Freezing And Fast Chilling Easy Release Of Ice Mold Trays. Easy To Clean Vertical Ice Cube Tray. Note: —Kindly Wash The Ice Cube Trays And Lids Before First Use —Please Wash And Thoroughly Dry Ice Cube Trays With Soap And Hot Water Before The First Usage. Do Not Use A Metal Brush To Clean These Ice Cube Trays. —Ice Is Usually Tightly Attached To The Mold When First Taken From The Refrigerator, We Highly Recommend You To Wait For A While, Which Will Make It Much Easier To Push Out The Ice Cubes. —Please Do Not Overflow The Cells With Water. You'D Better Not Add Too Much Water In Case The Ice And The Cover Stick Together. —The Function Of The Lid Is Not To Cover The Ice Cube Trays Tightly, Its Main Functions: 1. Convenient For The Superposition Between Ice Cube Trays 2. Keeps Ice Cubes From Absorbing Freezer Odors 3. Prevent Spilling