- Effective Cold Retention: The large ice particles provide exceptional expansion, cooling performance, and reliable efficiency, keeping your food and beverages cool for hours. - Durable Construction: Made from thickened PE material, these ice packs for lunch boxes are designed for long-lasting use. They are resistant to breakage, ensuring consistent performance for your daily cooling needs. - Portable Design: This lightweight ice pack is engineered for easy transport and storage. It fits perfectly in backpacks, making it an ideal companion for your lunchtime cooling needs without taking up extra space. - Simple to Use: Just add water to activate the ice crystals, then freeze for 2 to 4 hours in the refrigerator. This straightforward process ensures your lunch stays cool throughout the day. Use Scenarios: - Perfect for school lunches, keeping sandwiches and snacks fresh until lunchtime. - Ideal for picnics or outdoor events, ensuring beverages remain chilled during hot days. - Great for meal prep, maintaining the temperature of prepared meals while on the go.