Food grade material: This ice tray is made of food grade ABS and PP material. You can use it to make ice or store food with confidence. Important Note: Please read the install instruction on the picture before purchase. This tray imitate the manual twist ice tray by the button, as long as you put the ice tray and the button in the right place, it be very easy to release the . This is a tray we designed this year, our thought is to easier to release the , it is different from the traditional mold. If you want to try , you can try this one. Also it's a gift for your friends. Easy release tray: This ice trays for freezer is designed with an innovative release design, which makes it easier to release. Just place the ice tray in the right position and the button on the lid with your finger and you can easily release the . Note: After removing the tray from the refrigerator, please let it stand for 1 minute before demolding. When demolding, if the have not fallen off, please do not the button vigorously. You can make all off by pressing the button repeatedly for 2-3 times.