- Leak-proof and Durable: Made from thickened PE material, these freezer packs for refrigerators are designed to prevent leaks while being robust and long-lasting. Their compact size allows for easy storage and cleaning. - Versatile Usage: Ideal for a wide range of cooling needs, these ice packs are perfect for food preservation, fan conditioning, incubator temperature control, back milk storage, fish preservation, and cooling pets. - Effective Cold Insulation: Engineered to provide extended cooling, these reusable packs offer an efficient way to keep your items cold and can enhance the effect of air conditioning for a cooler environment. - Simple to Use: To activate, simply add water to the freezer pack. As the ice crystal particles expand, ensure you leave some space for expansion. Place the pack in the refrigerator for 2-4 hours before using it in lunch bags or for other cooling needs. Each pack is designed for practicality, making them indispensable for anyone looking to keep their food fresh, maintain temperature-sensitive items, or provide relief on hot days.