- Reusable Cooling Solution: Experience powerful cold retention with our high-capacity thermal storage. The reusable ice crystal box cooling bags provide long-lasting cooling support for air conditioners, utilizing coarse crystal expansion and dependable ice-pack reusability. - Smart Fill Technology: Our ice packs for lunch boxes feature a container-safe fill guide to prevent overfilling. This design allows for balanced water absorption during freezing, accommodating volume increases triggered by hydration. Enjoy a reliable solution with thoughtful expansion allowances. - Efficient Cooling Performance: Leveraging innovative crystal technology, these cooler ice packs are optimized for evaporative fan cooling systems. They deliver consistent chilling and sustained cold retention for multiple uses, ensuring peak performance every time. - User-Friendly Design: Perfect for lunch bags, these ice packs offer a straightforward freezing method. With easy activation and cooling crystals that are simple to apply, you can rely on hassle-free performance without complicated preparation. Use Scenarios: 1. Keep your lunch fresh and cool during picnics or workdays by placing these ice packs in your lunch bag. 2. Enhance the cooling efficiency of your evaporative fan during hot summer days, ensuring your space remains comfortable. 3. Utilize these packs for outdoor events or road trips, providing reliable cooling for perishable items and beverages. With a focus on function and compatibility, our ice packs are designed to meet your cooling needs effectively.