Expansion control system - With a container-safe filling guide and a non-fill instruction, the product uses precision water-absorbent expansion to ensure an optimal fit during freezing and enable consistent cooling performance. Efficient cooling solution - Features innovative crystal technology, optimized for evaporative-fan cooling systems, delivering a consistent cooling improvement and lasting cold retention across multiple uses without affecting performance. Durable cooling performance - Provides high-capacity thermal retention and coarse crystal technology, delivering long-lasting reusable cooling. Wide applicability - A cooling solution for camping, travel cooling scenarios, and portable air coolers, offering safe chilling options for food and breast milk with multi-scenario functionality. Use scenarios - Camping and outdoor trips: keep perishable foods, beverages, and breast milk cold during outings. - Travel and road trips: maintain cold temperatures in coolers and bags across long journeys. - Home or office with evaporative cooling systems: support safe chilling for foods and breast milk in multi-scenario setups.