- Long-lasting Cooling Effect: Engineered with expandable coarse particles, these ice packs provide exceptional cold retention to keep your meals and beverages cool for extended periods. - Durable Construction: Made from thickened PE material, these lunchbox ice packs are designed to be break-resistant, ensuring long-term durability even with regular use. - Portable Design: With a compact size and lightweight build, these ice packs easily fit into backpacks, making them ideal for maintaining the temperature of your food while on the go. - Easy to Use: Simply add water to activate the ice crystal particles, freeze the pack for 2-4 hours, and enjoy a reliable method of keeping your lunch container cool throughout the day. Use Cases: 1. Perfect for school lunches, these ice packs keep sandwiches and snacks fresh until lunchtime. 2. Ideal for picnics or day trips, ensuring that beverages remain chilled and food stays safe to eat. 3. Great for work lunches, providing peace of mind that your meals will stay at the right temperature until you're ready to enjoy them. Experience reliable cooling performance with these essential lunchbox ice packs, designed for convenience and durability in your daily routine.