Hey there! If you're looking for a better way to keep your food and drinks cold, these reusable ice pack sheets are exactly what you need. They're not actually dry ice (just to be clear - no smoke or anything scary!), but they work amazingly well. Each package comes with 6 large sheets that you can easily customize by cutting between the cells to fit any container. Just soak them in water for 3-5 minutes, let them expand to about 3cm thick, dry them off, and freeze for 6+ hours. What's really cool is they don't make a mess - no dripping, no sweating, no sliminess. They're perfect for shipping frozen food, seafood, breast milk, medicine, or even chocolate. I love using them in my cooler for camping trips and picnics because they keep things cold for hours, especially when paired with an insulated bag. Pro tip: when freezing them, don't let the mesh sides touch each other or they'll stick together. Also, store them in a zip-lock bag to maintain their water absorption power. After several uses, if they start looking flat, just soak them again for a minute or two and they'll plump right back up. Seriously, these things are game-changers for anyone who needs reliable cooling without the hassle of traditional ice.