Polar Tech Ice Brix leakproof viscous gel refrigerant poly pack. Ice-Brix is a specially formulated leakproof, long lasting, viscous gel refrigerant that is made with non-toxic ingredients included in the FDA (GRAS) provision. Generally regarded as a safe substitute. They are sealed in a heavy-duty plastic pouch and keeps perishable products at a constant and desirable temperature. Ice-Brix was rated "Best in all aspects". Ice-Brix is the ultimate in refrigerant cold packs. Their unique features includes long lasting cold, efficient transfer of energy, leakproof, reusable, economical, custom imprinting. Custom imprinting available on all films. Your logo or design can be imprinted on these bags in red, green, blue or black. Low minimum runs and a small set-up charge required. Standard leakproof style.