Can easily stack, ice is easy to remove, makes perfect size small cubes The trays are made of thick silicon and are not flimsy?The ice cube molds are perfectly and uniformly shaped so they make beautiful tiny ice cubes Food grade silicone material,high temperature resistance,resist low temperature(-40-230?)?Can be frozen,microwavable,The handles are large enough that they're easy to manage For people who are counting calories, watching blood sugar, or quitting smoking these ice cubes can help a lot The silicone is slightly bendable so that you are able to get the ice out of the trays once it's frozen