Homoyoyo 4 Pcs Ice Packs for Coolers Reusable Freezer Packs Ice Block Cooler for Lunch Box Office Home Use Air Conditioner Fan Crystal Boxes, Requires Water Filling Medium, Pe

["Innovative Cooling Technology: These reusable ice block for lunch box utilize advanced ice crystal pack design to effectively lower indoor temperature and enhance air cooler performance for a refreshing summer environment","Eco-Friendly and Safe Material: Made from PE material, these safe ice packs coolers require no electricity and provide an cooling solution for healthy family use","Medium Compact Size: Measuring approximately 5.5 by 3.5 by 1 inch, these small ice packs cooler are portable and convenient to use in various locations including office, bedroom, and living room","Easy Water Filling: Simply fill the ice packs for coolers with water and freeze to enjoy cool air without the need for constant refilling or replacement","Versatile Usage Options: Beyond use with evaporative air cooler, these reusable cool pack for cans can also be applied for cold compress, food preservation, and keeping beverages chilled during travel or picnics"]