An Ice Brick® Shipping Pack is a non-toxic, water-based gel refrigerant shipping pack specifically designed and engineered for cold transport and storage of perishable items and shipping heat-sensitive products. A safer alternative to dry ice, great for lunch boxes, coolers and cold transport of various foods, pharmaceuticals, vaccines, blood samples, medicines, chocolates, meats and other perishable items. Place in freezer for a few hours to chill and Ice Bricks are ready for use. Each measures 4" x 6" and contains 8 ounces of gel. Note: Not to be used on the body or in first aid. Also available in Large, item W10552.