Features:Self-sealing design, It's effectively prevents liquid leak from the bag in the freezer. Food grade PE material without BPA These disposable ice cube packs are convenient, sanitary. Ice cube packs can be stacked, save space. Usage: 1. Slowly inject the liquid that needs to be frozen. 2. After filling the beverage or water, squeeze the opening to turn the ice pack and seal it. 3. Tear open the bag after freezing and use.Package includes: :100 x Ice Making Bag(can make 2400 ice cubes): 1 x Silicone funnels Tips: The ice cube bag is disposable and cannot be reused. After the ice bag is filled with water, you need to turn the bag back up to seal it automatically, otherwise it will leak.