1. [Easy Release&Move]Soft silicone material is easier to release, which makes it easy to create perfect ice cubes.PP edges are easy to fill with water and transport to the zer, won't leak or deform during transportation. 2. [Large Whiskey Ice Cubes]Ice molds make up to 8 square ice cubes at a time. Large ice cubes melt more slowly, keeping your drink tasting its for longer. It does not dilute the liquor and ensures the original flavor of your drink. 3. [Food-Grade Material]This ice cube tray is made of high quality silicone, BPA , y and environmentally friendly. Ice trays can be stored at low temperatures and the large square ice tray is also dishwasher . 4. [Stackable to Prevent Food Odors]The large ice cube molds comes with a tight removable lid that prevents ice cubes/food from absorbing zer odors, thus keeping your food or ice cubes fresh and clean. Stackable design saves a lot of space.