Portable, pocket-friendly design Slim profile and lightweight construction fit easily into most bags, lunch boxes, and carrier pockets. Carry practical cooling power wherever you go. Durable, food-safe construction Reinforced PE material provides long-term dimensional stability and break resistance, built for regular use in lunch containers and on-the-go storage. Reliable, consistent cooling performance Expandable crystal structure delivers strong cold retention and maintains low temperatures for hours, keeping food and drinks reliably cool during transport. Versatile compatibility Effective for breast milk storage and general food cooling. Also supports cool transport and use with portable coolers or fan-assisted cooling setups. Designed for safe continuous use across a range of everyday scenarios thanks to stable material properties. Specific applications Breastfeeding parents: Keep expressed milk cool and protected in a nursing bag or insulated cooler for daycare drop-off or travel. Work or school lunches: Slim, reusable cold pack fits inside lunch boxes to keep meals fresh until mealtime. Outdoor trips and beverages: Stabilizes temperature for drinks and snacks during picnics, short hikes, or commutes. What makes it stand out Combination of reinforced PE durability and a crystal cold-binding system ensures repeatable, long-lasting performance without cracking or deformation. Slim, lightweight form factor offers easy storage and everyday portability without sacrificing cooling time. Materials and care Reinforced PE outer shell for impact resistance. Follow standard cleaning and freezing instructions for reusable cooling packs; do not puncture or expose to open flame.