flexible refrigeration cold packs & Nontoxic used for safe transportation of temperature sensitive products which require cold room condition to maintain quality, effectiveness, freshness & integrity. Gel packs have a high cold retention capacity as compared to wet or dry ice. These are long-lasting and economical providing superior protection for temperature sensitive material. This is best used for transport of fresh foods, truffles, fish, seafood, meat, fruit, flowers, etc. up to 36 hours.