- EASY TO USE: Simply add water to activate the expansion of ice crystals and freeze for 2-4 hours. This practical solution keeps your lunch box cool all day long without complicated steps. - VERSATILE APPLICATIONS: Perfect for storing breast milk and keeping food fresh, it also aids in the insulated transport of items while optimizing airflow for fans and air conditioning. Offers reliable cooling performance for travel or at home with guaranteed durability. - PORTABLE DESIGN: Its lightweight and space-saving structure easily fits into any backpack. Ideal for outdoor activities and convenient transport during travel or daily commutes. - FUNCTIONALITY: Designed to maintain low temperatures, ensuring the safety of perishable items while on the go. - COMPATIBILITY: Suitable for various containers, making it a versatile choice for everyday use or special occasions. - SIZE AND MATERIAL: Compact size allows for easy storage, constructed from high-quality materials that ensure longevity and effectiveness. Experience the convenience of keeping your food and breast milk fresh with a simple solution that adapts to your lifestyle.