- Long-Lasting Cooling Effect: Engineered with expandable coarse particles, these cooling packs provide exceptional cold retention capabilities, ensuring your meals and beverages stay chilled for extended periods. - Durable Construction: Made from thickened PE, these lunchbox cooling packs are designed to be break-resistant, offering long-lasting durability for regular use. - Portable Design: Compact and lightweight, these cooling packs easily fit into backpacks, making them ideal for maintaining portability while keeping your meals fresh and cool. - Easy to Use: Simply add water to activate the ice crystal particles, freeze the pack for 2-4 hours, and enjoy a reliable method to keep your lunch container cold throughout the day. Use Scenarios: 1. Perfect for school lunches, these cooling packs ensure that sandwiches and snacks remain fresh and appetizing until lunchtime. 2. Ideal for picnics or road trips, they keep beverages cool and refreshing, enhancing your outdoor dining experience. 3. Great for meal preppers, these packs help maintain the ideal temperature of prepared meals, allowing for convenient and safe storage. Experience reliable cooling performance with our specially designed lunchbox cooling packs, where durability and portability meet functionality.