Penitue 4pcs Ice Packs for Lunch Boxes, Reusable Freezer Packs Lightweight Blocks Freezer Small Cold Bags Multifunctional Cooler Accessories for Picnic School Camping Food Freshness (Blue)

["Package Includes: Get 4 pieces of blue ice packs for lunch boxes in the package, enough quantity to satisfy your everyday uses and replacement needs when you go outside.","Proper Sizes: Our freezer packs are about 17x12cm/6.7x4.72in, fitting easily in most lunch boxes and coolers, providing effective cooling without taking up much space.","Versatile Usage: These blue ice packs are ideal for lunch boxes, picnics, road trips, school, hiking, fishing, camping and other outdoor activities. Their lightweight design keeps food and drinks cold, making them perfect for any occasion.","Excellent Material: Made of good quality spring spun yarn and superabsorbent polymer, these cold packs are durable, lightweight, water-activated, leak-proof, long-lasting uses, hard to break or damage. You can buy them with confidence.","How to Use: To prepare the ice pack, soak it in water for 3-5 minutes, then remove it and dry the surface. Next, place it in the freezer for about 6 hours, after which it will be ready for use. The ice pack will keep its cooling effect for several hours."]