- Durable Construction: Our freezer packs for coolers are made from thickened PE material, ensuring they are leak-proof and sturdy. They are designed to be space-efficient and easy to clean, making them a practical choice for your cooling needs. - Simple Preparation: To activate the freezer packs, simply add water. The ice crystal particles will expand, so be sure to leave some space for this process. Once filled, place the packs in the refrigerator for 2-4 hours before use. They are perfect for lunch bags and on-the-go cooling. - Effective Cold Insulation: These cooler ice packs provide long-lasting cold storage and are reusable. They enhance the cooling effect of air conditioning fans, making your environment more comfortable and refreshing. - Versatile Applications: Ideal for various cooling scenarios, our ice packs are perfect for food preservation, keeping air conditioning fans frosty, incubator temperature control, breast milk storage, fish preservation, and providing cooling relief for pets. By choosing our freezer packs, you are ensuring that your items stay cold and fresh, whether at home, during travel, or in outdoor settings.