Easy to carry: Compact, lightweight ice blocks with a carry-strap design make them simple to transport for cooling needs at home, in the car, or outdoors. Simple to prepare and use: Fill with water, freeze, and they are ready — quick to prepare and reusable after thawing. No complicated setup or accessories required. Durable and leak-proof: Built with wear-resistant, leak-proof construction that resists deformation and delivers consistent cooling performance over repeated use. Versatile compatibility and safe for food: Designed to work with car coolers and portable coolers, providing effective cooling during transport. Safe for use with breast milk and other foods. Key attributes Function: Passive cooling blocks that maintain low temperatures in coolers and insulated bags. Portability: Small, lightweight format with carry strap for easy handling and transport. Performance: Reliable, deformation-resistant cooling for extended use. Safety: Leak-proof design and food-safe construction suitable for breast milk and food storage. Practical use scenarios Travel and road trips: Keep drinks, snacks, and perishable groceries cool in a car cooler during longer drives. Baby feeding and daycare: Maintain breast milk or prepared baby food at safe temperatures during outings or when traveling between home and daycare. Outdoor activities: Use in picnic coolers, camping coolers, or portable food boxes to preserve food and beverages during hikes, picnics, or sports events. What you get Compact, reusable ice blocks that are easy to carry, quick to prepare, durable under regular use, compatible with common coolers, and safe for food and breast milk storage.