Keeps food and breast milk reliably cold while staying compact and easy to carry. Key benefits Portable and space-saving: Compact size and lightweight design fit easily into backpacks, lunch boxes, and cooler bags so you can transport chilled items without bulk. Durable construction: Reinforced PE material provides long-term stability and strong break-resistance for repeated daily use. Consistent cooling performance: Ice-crystal core with high expansion capacity maintains a stable cold temperature to keep food and drinks properly chilled. Versatile compatibility: Designed for food cooling and safe storage of expressed breast milk; also supports portable fan/ventilation cooling systems and insulated containers. How this product solves common problems Keeps meals fresh on the go: Prevents food from warming during commute or work hours, reducing waste and ensuring meal safety. Protects breast milk during transport: Helps maintain the cold chain when carrying expressed milk to daycare or medical appointments. Low-maintenance and reusable: Durable PE construction stands up to regular use in lunch boxes and insulated bags. Practical use scenarios Commuter lunch: Slip into a work lunch box to keep sandwiches, salads, and beverages chilled until lunchtime. Travel or outdoor day trip: Place in a backpack or cooler for picnics, hiking breaks, or road trips to preserve perishables. Breast milk transport: Use in an insulated bag to maintain a stable cold environment when bringing expressed milk to daycare or medical visits. Key attributes at a glance Function: Passive cooling insert for food and breast milk Compatibility: Lunch boxes, cooler bags, insulated carriers, and fan/ventilation-assisted systems Material: Reinforced PE for durability and break resistance Performance: Ice-crystal core with high expansion capacity for steady cooling Reliable, compact, and built for repeated use — a practical cooling solution for everyday and on-the-go needs.