Available in 08 fl oz, 16 fl oz, 24 fl oz and 32 fl oz sizes. Our gel packs use a +30°F formulation that is both nontoxic and noncaustic. They are our most cost effective refrigerant. Our gel packs are the perfect refrigerant solution for shipments and packaging where variable height tolerances are acceptable as this formulation does tend to have irregular expansion during the freezing process. This product can be reused, but is generally used for shipment in one way packages because of its low cost nature.