GATHINESS 4pcs Ice Crystal Boxes for Portable Air Conditioner Fan, Reusable Ice Packs for Swamp Cooler and Room Cooling, Freezer Blocks for Lunch Box, Camping & Office - Pre-Filled (150ml/5oz)

["Boost Your Cooling Experience: Specially designed for Evaporative Air Coolers and Swamp Fans. These ice crystal boxes provide a much lower temperature than regular ice, rapidly cooling the airflow for a frosty breeze in seconds","Hassle-Free & No Filling Required: Pre-filled with premium high-density cooling gel. Unlike traditional ice packs, you never need to add water. Just freeze for 4-6 hours and they are ready to use, effectively preventing messy leaks","Extended Cooling Performance: Engineered with high-density resin material that stores cold energy efficiently. These 5oz slim ice blocks maintain a low temperature longer than conventional water-filled packs, helping keep your room or lunch cool for hours","Compact & Universal Fit: Measuring 4.13\" x 2.55\" x 0.98\", the slim profile fits perfectly into most portable AC fans, small coolers, and lunch bags. Ideal for home, office, dormitory, or outdoor camping","Safe, Durable & Reusable: Made of food-grade, thickened plastic. These cooling bricks are built to withstand repeated freezing cycles without deforming or cracking. A sustainable solution for all your cooling needs"]