ABOXOBOG Reusable Ice Packs for Coolers Long Lasting Gel Freezer Packs for Cooler Bag Backpacks, Lunch Box, Cooler Bag, Keeps Food Cold Fresh (Small Set of 4)

You'll have enough for all your food cooling freezer packs demand. Included in a set - five corks & one funnel,Each pack need fill in 28 ounces?3 1/2 cups of 8oz?of water.Save more space for your coolers & Extended the food and drinks cooling time.Add Water Once & ReusableThe inside of the ice pack is filled with a proprietary cooling gel mixture, just add water at home, shake and seal, and then turn it into a solid block after freezing, which creates a reusable ice pack. ice packs start out at freezer temperature and gradually heat up. Throughout the melting process, ice packs maintain the advantage of a lower melting point than traditional ice cubes.When the ice starts to melt and warm in your cooler, ice packs still remain cold, even as they begin to thaw.