- Effective Cooling Performance: The textured surface and expandable ice crystal particles provide excellent cooling retention, keeping your packed lunches and beverages chilled for extended periods. - Durable Material: Made from thickened PE, these ice packs are designed for long-lasting strength. They won’t easily break, ensuring reliable use while keeping your food well-preserved. - Portable Design: With a compact shape and lightweight construction, these ice packs fit seamlessly into backpacks, offering effortless mobility and dependable performance for outdoor adventures or daily activities. - Simple Operation: Just fill the ice pack with water, allow the ice crystal particles to expand naturally, and freeze for 2-4 hours. This ensures easy and reliable cooling whenever you need it. - Versatile Applications: Perfect for road trips, picnics, or daily lunchboxes, these ice packs keep your food fresh and drinks cool whether you’re at the beach, in the park, or on your commute. Choose these ice packs for their reliability, convenience, and ability to enhance your chilling experience.