Key benefit: Keeps lunches and drinks cold and safe Coarse ice-crystal particles increase cold storage capacity and deliver steady, uniform cooling to help preserve food and beverages in lunchboxes and small coolers. Durable construction for long-term use Made from thickened PE (polyethylene) for improved puncture and break resistance. Built to withstand regular use without splitting or leaking. Compact and portable Slim, lightweight shape fits easily into backpacks, lunch bags, and bento boxes for hassle-free transport during commutes, school, or outdoor activities. Simple, reliable operation Add water to activate the expanding ice-crystal particles, then freeze for about 2–4 hours. Place frozen pack alongside food to maintain lower temperatures in your lunchbox. Features at a glance Function: Extended cold storage and consistent cooling for food and drinks Material: Thickened PE outer shell Performance: Reinforced with coarse ice-crystal particles for improved cooling capacity Portability: Compact, lightweight form factor compatible with most lunchboxes and small coolers Durability: Designed for repeated use; resistant to breakage Practical use scenarios Office or work lunch: Keep sandwiches, salads and dairy safely chilled until lunchtime. School or daycare: Slip a frozen pack into a child’s lunchbox to maintain safe temperatures during the day. Outdoor activities and travel: Use in picnic coolers, hiking daypacks, or while commuting to keep beverages and snacks cool. How to use 1. Add water to the pack to allow the ice-crystal particles to expand. 2. Place the sealed pack in the freezer for approximately 2–4 hours. 3. Insert the frozen pack into your lunchbox or cooler next to the items you want to keep cold. What this solves Prevents food from warming and spoiling during transport. Eliminates bulky or heavy ice blocks while delivering consistent cooling. Reduces risk of punctures or leaks with a reinforced PE outer shell for reliable, repeated use.