KASTWAVE Ice Packs for Lunch Box - Reusable Ultra-Thin Freezer Packs - Long-Lasting Cool Packs for Coolers, Keep Food Fresh and Cold in Lunch Boxes and breastmilk Bags

【 Keep Food & Drinks Cold 】With Cooler Backpack, keep cold and fresh for 18 hours. Great for lunch box and outdoor activities
【 Keep Breastmilk Fresh】Bring back fresh breast milk for your baby to grow better. No longer need to carry multiple backpacks!
【 Save Space】4 ice packs (6.5” x 4.3” x 0.5”) will fit in just about any lunch box or coolers that you can think of and takes up less food or drink space
【 Reusable 】Not like ice, ice packs don't make a mess as they thaw and will stay frozen for longer. sandwiches and other food items don’t get ruined when ice packs start melting
【 Easy Clean 】Just add water and stir to turn into a gel, freeze ice packs the night before use. Just rinse them and pop them back in the freezer after use, ready for next time