YARNOW 4 Pcs Ice Packs for Lunch Boxes & Cooler, Freezer Packs for Air Conditioner Fan, Reusable Ice Blocks

["Quiet Operation Design: Featuring a noise-reducing structure, these ice packs for cooler ensure silent performance that will not disturb your rest or work environment","Compact and Convenient Size: Measuring 2.36 x 1.57 x 7.08 inches, these freezer packs for lunch boxes fit easily into most freezers and coolers without occupying excessive space","Innovative Cooling Technology: These cold packs for lunch box use advanced ice crystal cooling technology to provide rapid temperature reduction and a refreshing cooling experience ideal for hot days","Multipurpose Functionality: Designed as reusable ice boxes, they serve as both ice packs for coolers and ice blocks for chilling beverages or food, enhancing versatility for different cooling needs","Energy Efficient and Eco-Friendly: The freezer packs for coolers operate by maintaining cold temperatures without additional power consumption, helping to conserve energy and reduce electricity costs"]