Chillin’ Brew™ Ice Paks are an Eco-friendly way to keep the contents inside your cooler colder longer. They can be used independently or in conjunction with conventional ice to help keep it frozen longer ensuring a cooler trip. The Chillin’ Brew Ice packs are a great cooler accessory for any cooler and will certainly keep your contents cold on shorter outings or for bringing your groceries home. They can be frozen in 6-10 hours in any standard residential freezer making it convenient for daily use. A must have for those who pack their own lunch.