The Aootsmile Breastmilk Cooler uses advanced 360° cooling tube technology to keep milk fresh and nutrient-rich for over 24 hours without ice, preserving essential DHA. It features 2 large, leak-proof BPA-free storage bottles and a durable, food-grade 316 stainless steel body. Its portable, multi-functional design is the perfect solution for on-the-go moms for travel, work, or daily use.