Smart Fill Technology Container-safe fill process with clear overfill guidance to create balanced water-absorbent expansion during the freezing phase. A thoughtful expansion framework ensures reliable performance and consistent cooling results. Reliable Cold Operation Advanced chill-enhancing additives designed for evaporative-louvers style cooling systems provide strong cold retention. Compatible with reusable cold sources to support uninterrupted cooling performance. Convenient Use Ideal for lunch bags with an easy activation design tailored for portable use. Utilizes advanced cooling crystal technology to deliver efficient self-prepared ice pack function and consistent, convenient cooling results. Wide Versatility A versatile thermal management tool safe for storing food and breast milk. Supports camping, travel coolers, and portable air cooler applications for flexible cooling needs.