Versatile and Portable: These ice packs are incredibly versatile and can be used in various settings. They are ideal for refrigerators, coolers, lunchboxes, picnic baskets, and even air conditioners and fans. Their compact size and lightweight design make them easy to carry and transport wherever you need to keep things cool.Stay Cool and Refreshed: Our set of 4 long-lasting ice packs is the perfect solution to keep your beverages, food, and surroundings cool and comfortable. Whether you need to chill your drinks for a picnic, keep your lunch fresh at work, or cool down your living space, these reusable ice packs are a reliable choice.Reusable and Eco-Friendly: The freezer blocks are made from thickened PE material, ensuring durability and preventing leaks. Their sturdy design allows them to withstand regular use without taking up excessive space. Additionally, they are easy to clean, making maintenance a breeze.This not only saves you money in the long run but also reduces waste and helps protect the environment.Extended Cooling Power: These freezer packs require the addition of water to activate. These freezer blocks are designed to provide long-lasting cooling effects. Once water is added, the ice crystal particles expand, so it's important to leave sufficient space for expansion. After expansion, simply place the packs in the refrigerator for approximately 2-4 hours, and they will be ready to use in your lunch bags or coolers.Effective Cold Insulation: Our freezer packs feature dry ice crystal particles that provide exceptional cold storage. With their coarse particles and strong expansion capabilities, these packs offer powerful cooling performance. Besides their primary function of cooling, these Cooler Ice Packs also excel at insulating cold air. They can be used in conjunction with air conditioning fans to enhance the frostiness of the cold air, creating a more comfortable and refreshing environment.