41% Faster Cooling to Optimal 4°C, Pure Nutrition Preservation: Pioneering UltraChillTM technology rapidly chills milk to the 4°C standard and keeps it fresh and nutritious. 360° cooling effectively minimizes bacterial growth while preserving vital nutrients and natural taste, ensuring every sip is fresh and safe. 600 ml Capacity, Multi-Size Bottles for Safer Milk Storage: With 600 ml total capacity, including 2 x 300 ml and 3 x 150 ml bottles, this set offers flexible all-day storage. Separate warm and chilled milk to prevent contamination, preserve nutrients, and keep every sip fresh and safe. Chill On the Go, Fresh for 12 Hours: No ice packs, no leaks-just pre-chill the ice ring, place it in the cooler, and you're ready to go. Compact and portable, milk stays fresh for commutes, outings, or travel. All-Inclusive Protection, Guarding Every Drop: Certified food-grade, BPA-free materials safe for newborns and sensitive babies. Rigorously tested with a durable, leak-proof design to keep milk fresh on the go-ready for every moment in your busy life. Effortless Cleaning, Always Ready: Designed for busy working moms, the wide-mouth, detachable design makes daily cleaning quick and easy, keeping your bottles clean and hygienic with minimal effort.