INSTRUCTIONS: 1. Unscrew the lid, pour water to the recess of the top wave of the box, and gently shake it for 2 minutes until it gels inside, then tighten the lid. 2. Place the ice packs flat in the refrigerator for 8-12 hours, then take it out and put it in a heat preservation bag or box with the food. 3. When not use, keep in a cool place. SAFE&DURABLE: The ice pack housing is made of food-grade materials, there are ice crystal particles in the box, safe, non-toxic and tasteless. Using a reusable ice pack, can cut down on wasting plastics that are harmful to the planet. LONG-LASTING: Ice crystal particles filled long lasting ice pack retains coldness much longer than ordinary water injected ice packs for cooler. They stay cool for many hours and keep your food fresh and your body fit. CONTOURED SHAPE: Set of 2, each contoured ice pack measures 7.87 x1.38x 4.72inches. The contoured shape of the can ice pack makes it ideal for keeping beverages cold in your cooler or breastmilk bottles cold in your insulated bag. REUSABLE ICE PACK: Reusable and versatile bottle ice packs. Lightweight and portable design saves more space for your cooler/lunch bag. Perfect for any occasion - lunch bags, cooler backpacks, breastmilk bags, work or for outdoor camping. Reusable Ice Long Lasting Packs for Breastmilk Storage, Cooler Bag, Breakfast