4pcs Ice Packs for Lunch Box, Long-Lasting Little Freeze Blocks for Kids Sandwich Boxes,Keep Food Fresh and Cold in Lunch Boxes and breastmilk Bags,Air cooler Ice Packs (D4pcs)

4 pcs box,✅Usage: there is frozen powder in the box, please open the lid, add appropriate amount of water, not too full. ✅Size: Ice pack measure at approx. 16.1cmX 9.5cm. Light and Thin stackable design is easy to collocate with almost lunch boxes and save space. The fasteners of ice pack can fix it on the lunch box long time freezer keeping food cold. ✅Usage: Ice packs are used in coolers to keep perishable foods (especially meats, dairy products, eggs, Cold Pack for Lunch Box, etc.) below the 5–75 °C (41–167 °F) danger zone when outside a refrigerator or freezer, and to keep drinks pleasantly cool. ✅Travel Daily Used: Both ice and other non-toxic refrigerants (mostly water) can absorb a considerable amount of heat before they warm above 0 °C (32 °F) used to keep food cool in portable coolers, or as a cold compress to alleviate the pain of minor injuries, or in insulated shipping containers to keep products cool during transport. ✅Longest lasting ice pack: Make children school lunch be cool and fresh such as sandwich, cheese, milk or fruit. Helpful for reducing the loss of nutrition of food keep it fresh and cold.