Efficient, container-friendly reusable cooling pack that controls freeze-time expansion and delivers long-lasting, reliable temperature control for coolers and portable refrigeration. Key benefits Controlled expansion for a perfect fit: Built-in filling aid with overfill limit manages water uptake and expansion during freezing, so the pack sits correctly in containers without bulging or damage. Energy-efficient hydration design: Smart expansion mechanism accommodates volume increase during freezing, reducing stress on containers and improving overall thermal efficiency. Ready-to-use and reliable: Activate by freezing — powerful coarse cooling crystals provide consistent cold retention and temperature stability in cool boxes and portable coolers. Long-lasting performance: High heat-storage capacity and coarse-crystal technology maintain effective cooling across many uses without measurable performance loss. Multi-purpose and safe: Suitable for food, breast milk and general perishable items; designed for repeated, hygienic use. Features and compatibility Function: Reusable cold pack optimized for freezing activation and secure placement inside coolers, boxes and air coolers. Fit: Container-friendly filling design helps the pack conform to internal cooler space for stable contact with items to be cooled. Performance: High thermal storage and coarse-crystal cooling medium deliver sustained cold hold and predictable thaw behavior. Ease of use: Simple self-preparation — fill to the indicated level, freeze, and place in your cooler; the overfill limiter prevents over-expansion. Typical use scenarios Camping and outdoor trips: Keeps food and drinks cold for multi-day excursions without frequent refreezing or replacement. Travel coolers and road transport: Maintains steady temperatures during transit for groceries, picnic items, and medication. Breast milk and baby food transport: Provides dependable, safe cooling for expressed milk and baby supplies during short- to medium-length outings. Why choose this cooling pack Minimizes container stress and leakage risk by controlling freeze expansion. Delivers repeatable, long-lasting cold through robust crystal-based thermal storage. Easy to prepare and compatible with a variety of portable cooling systems, making it practical for everyday use and travel.