1.Reusable Cooling Solution: Delivers strong coldholding power with capacity thermal storage, ensuring extended reusable cooling support for air conditioners through coarse crystal expansion and reliable icepack reusability 2.Adaptive Freeze Expansion: Incorporates a containersafe fill guide and nooverfilling instruction, enabling controlled waterabsorbing expansion for ideal freezingphase adaptation, while facilitating hydrationtriggered volume growth via a carefully crafted expansionallowance feature, improving performance 3.Efficient Cooling Solution: Utilize innovative crystal technology, optimized for evaporative fan cooling systems, offering consistent chill improvement, and sustained cold retention over multiple uses, without compromising performance 4.User Friendly: Designed for lunch bag cooling with easy freeze activation method, these ice packs offer a selfprep ice replacement solution using cooling crystals that are effortless to apply and assure reliable performance without hassle