【24H COOLING SUPPORT】Double-walled stainless steel insulation helps keep chilled breast milk below 59 degrees Fahrenheit for over 24 hours during workdays, daycare runs or commutes. 【DUAL BOTTLE SYSTEM】480 ml design includes two transparent PP storage bottles, 7 oz and 11 oz, so you can separate pumping sessions and check amounts with clear scales. 【LEAK-PROOF TRAVEL READY】Threaded seals on the inner tank and bottles help prevent spills in diaper bags, while the wide top handle makes carrying easier for travel and outdoor days. 【SAFE DAILY MATERIALS】BPA-free PP bottles and stainless steel storage provide a clean place for milk, helping protect freshness and nutritional value after pumping. 【NON-ELECTRIC PORTABILITY】No battery, cord or charger is required; the slim 3.8 inch footprint fits pumping routines at work, daycare drop-offs, road trips and flights. Long commute, daycare drop-off, or a packed workday can make pumped milk feel hard to manage. This portable breast milk cooler is built for hours away from home, pairing a double-walled stainless steel inner tank with two clear PP storage bottles for organized, chilled storage.Use the 7oz bottle for one session and the 11oz bottle for another, then nest them inside the 480ml cooler body. Threaded seals help reduce leaks in a diaper bag, while the wide handle makes it simple to carry from office to car to airport security. The non-electric design keeps your setup simple: no charging cable, no bulky base, just a compact breastmilk chiller bottle designed to help maintain milk below 59 degrees Fahrenheit for over 24 hours when prepared and used as directed.Finished in soft macaron blue with easy-read measurement scales, it supports pumping at work, travel days, outdoor errands, and everyday daycare routines.