Homoyoyo 8 Pcs Ice Packs, Reusable Freezer Packs for Lunch Boxes, Hard Ice Blocks for Cooler, Slim Cooler Freezer Blocks for Camping, Picnic, Beach, 4. 72 X 1. 97 X 1. 38 Inch Reusable Crystal

["Efficient Cooling Support: Fill the bottles with water and freeze before use. The ice packs help reduce the air temperature from evaporative air coolers, delivering stronger cooling performance than regular ice cubes while maintaining steady cold output","Reusable Freezer Ice Bottles: Designed for repeated use, simply refill with water and freeze again. The reusable ice crystal packs help reduce waste and provide a cooling solution for everyday use","Leak-Resistant Portable Design: Compact oval bottles with screw caps help prevent water leakage during freezing or use. The slim shape fits easily inside air cooler tanks without occupying excessive space","8 Pack Cooling Set: Includes eight freezer bottles that can be rotated during use. While some packs are cooling inside the air cooler, others can stay in the freezer for continuous cooling performance","Wide Compatibility: Suitable for most household evaporative air coolers, portable air conditioner fans, cooling fans, and air cooling systems used in bedrooms, offices, rental apartments, and small indoor spaces"]