24H+ Extended Outdoor Cooling: Momcozy breast milk cooler adopt 360° surround cooling tube technology keeps temperatures consistently cold for over 24 hours, preserving the freshness of your breast milk and preventing nutrient loss during outdoor activities. Simple and Convenient: Just pop the cooling tube in the refrigerator (around 0℉) for 12 hours beforehand (adjust freezing time as necessary), and then move it to the milk cooler for easy use. Ice-Free Cooling: Momcozy gel tube features innovative cooling gel technology, eliminating the need for ice while maintaining a consistently cold temperature. No more worries about melting ice affecting cooling efficiency—just reliable, long-lasting freshness for your milk storage. Hassle-free Clean: Designed for convenience, Momcozy gel tube cleans effortlessly with just a simple rinse under water. No more tedious scrubbing—just easy maintenance for a worry-free experience. Please note: Do not use a sterilizer, dishwasher, or boiling water for cleaning. Momcozy Cooling Gel Tube, Highly Efficient 24 Hour Cold Retention, Compatible with Momcozy Breast Milk Cooler, 2PCS