just place them in the freezer until solid, then insert them into your cooler or lunch box. The packs are lightweight and compact, making them ideal for on-the-go cooling needs, whether for work, school, or travel. Features -Color:Blue -Material:PE -Size:16.70X3.70X3.70cm/6.56X1.45X1.45in -Usage: Fill water, freeze in fridge, and place it in cooler fan or food bag. -Efficient cooling freezer block: the ice packs are designed to provide cooling, keeping your items chilled for extended periods -Wide range of uses: great for air cooler fans, cold chain transportation, and outdoor activities like camping, hiking, and picnics -great quality: made with PE materials, these ice packs are built to withstand repeated use without compromising on performance -Compact cooler ice pack: the portable size ensures easy storage and transportation, making them a practical choice for various cooling needs -Freshness: maintain the freshness of your food and drinks with these ice packs, ideal for lunch boxes and cooler bags Package list: 6 cooler pack