- Robust and Seamless Construction: Our high-quality cooling packs are made from thick PE material, ensuring they are leak-proof and easy to clean. This makes them suitable for long-term use in various environments. - Superior Cold Retention: Featuring coarse dry ice pellets, our freezer blocks deliver exceptional cooling performance with long-lasting energy retention. Perfect for large coolers, they provide reliable temperature control for extended periods. - Efficient Cooling Solution: This ice crystal box includes 8 reusable ice packs designed to enhance air cooler efficiency. They ensure prolonged cooling retention, maintaining optimal temperatures during extended use. - Convenient to Use: With a freezing time of just two to four hours, these ice crystal boxes offer a practical solution for preparing cool storage. They are ideal for lunch bags and portable coolers, making it easy to keep your food and drinks chilled. Applications: - Perfect for outdoor picnics or camping trips, keeping perishables fresh and beverages cold. - Great for transporting food for parties or events, ensuring everything stays at the right temperature. - Ideal for daily use in lunch bags, providing a refreshing meal experience at work or school.