Adaptive Freezing Design Designed with a container-friendly filling guide and overfill protection, this cooling pack allows controlled water absorption to achieve optimal expansion during freezing. An integrated expansion gap supports volume growth caused by hydration, helping improve overall cooling efficiency while reducing the risk of deformation. Easy to Use and Reusable Simply fill, freeze, and use. The cooling pack is optimized for coolers and refrigerators, using crystal-based cooling technology to deliver reliable cold performance. Its reusable construction supports daily use without complex preparation or maintenance. Long-Lasting Cooling Performance Built with high thermal storage capacity and coarse crystal structure, the pack retains cold effectively for extended periods. It maintains consistent cooling performance across repeated freeze and thaw cycles, making it suitable for frequent reuse without noticeable loss of efficiency. Versatile Applications Suitable for a wide range of scenarios, including camping coolers, travel ice boxes, and air cooler systems. It can be used to keep beverages cold, preserve food freshness, or safely store items such as breast milk during transport or short-term storage at home or outdoors. Reliable and Practical Design Engineered as a medium-size refrigerator and freezer accessory, this cooling pack fits easily into common cooler boxes and freezer compartments. Its practical structure and dependable cooling output make it a functional choice for home, travel, and outdoor use.