- Water Absorption and Freezing: Our ice crystal packs are designed to expand when absorbing water and freezing, so be sure to leave room in the container when filling. For optimal performance, freeze for 2-4 hours before use. Ideal for keeping your lunch bags cool. - Efficient Expansion: Each ice crystal pack is filled with dry ice crystal particles that are larger in size, allowing for better expansion and enhanced cooling capabilities. Enjoy long-lasting cooling with a generous capacity and high energy storage. - Superior Cold Insulation: These ice packs serve as excellent air conditioning ice crystals, improving the cooling effect of air conditioning fans. They provide extended cooling storage and can be reused multiple times for maximum efficiency. - Versatile Applications: Our ice packs are perfect for various cooling needs, including: Food preservation during picnics or road trips. Enhancing cold airflow for air conditioning units. Supporting temperature control in incubators for hatching eggs. Keeping breast milk fresh while on the go. Preserving the freshness of fish or pet food. These ice crystal packs ensure you have reliable cooling solutions for both everyday use and special occasions. Designed for practicality and efficiency, they are an essential addition to your cooling toolkit.