Consistent ColdHolding Power Combines capacity thermal storage with coarse crystal expansion to deliver reliable reusable cooling, maintaining longlasting performance with efficient icepack reusability for continuous use. Smart Fill Technology Engineered with a containersafe fill guide and nooverfilling instruction, for balanced waterabsorbing expansion during freezingphase adjustment. Accommodates hydrationtriggered volume increase through an expansionallowance framework, offering dependable function. LongLasting Chill Effect Achieves extended cooling performance with advanced coldretention crystals that work seamlessly with evaporative fans to improve air cooler efficiency, while ensuring repeateduse functionality. Easy to Use Designed to simplify lunch bag cooling, these ice packs utilize an intuitive freeze activation approach and performance cooling crystals, offering a reliable and easytouse solution for maintaining desired temperatures effectively. Use scenarios Daily lunch bag or commuter cooler: keeps sandwiches, drinks, and snacks at safe temperatures during school, work, or travel. Portable coolers for trips and outings: supports picnics, road trips, and camping by maintaining cool perishable items for extended periods. Small air cooling setups at home or office: pairs with evaporative fans to boost cooling efficiency and maintain cooler spaces without complexity.