Controlled freeze behavior and safe filling Includes container-friendly fill instructions and built-in overfill protection so you can add the correct amount of water before freezing. A designed expansion seam allows the internal cooling crystals to expand safely during freezing, preventing ruptures and improving long-term reliability. Fast, easy activation with modern cooling-crystal technology Activate by freezing according to the included guide. The cooling-crystal formula enables quick, predictable solidification and reliable cooling performance without complicated preparation. Long-lasting, reusable cold retention High heat-storage capacity and coarse-crystal expansion deliver strong, extended cooling power. The pack is made for repeated freeze–use cycles, providing dependable cold support over many uses. Versatile compatibility and safe cooling Built for use with coolers, travel chill boxes and air coolers. Suitable for keeping food, breast milk or other temperature-sensitive items cold in everyday situations. Key benefits — why you need it Prevents container failure and messy leaks thanks to overfill protection and the expansion seam. Reliable, repeatable cooling results from the cooling-crystal system and high heat storage. Saves time and hassle with simple activation and clear filling instructions. Multi-use design covers leisure, travel and household cooling needs. Practical use scenarios Camping and road trips: Place the pack in a travel cooler to keep perishable foods and drinks cold for longer periods without frequent refreezing. Transporting breast milk or medication: Use in a dedicated cooler to maintain safe temperatures during short transfers or appointments. Everyday cooling at home: Supplement air coolers or chill boxes during power interruptions, grocery runs, or backyard gatherings. What it does and how it stands out Manages internal volume changes during freezing to extend pack life and maintain performance. Cooling-crystal technology provides efficient cooling and consistent reuse. Clear preparation steps and safety features reduce user error and increase dependability. Compatibility and care Designed for use in coolers, travel chill boxes and air coolers. Follow the included fill and freezing instructions for best results. Rinse and dry before refilling; avoid punctures to preserve reuse life.