Probably means Techniice. It comes as a thin dehydrated sheet.
Amazon has it. Soak it in water for a few hours and the gel forms little pillows. The gel reduces the freeze point several degrees but also increases the "heat of fusion", the amount of heat required to melt a specific mass. After you use it you can let it dry out back to a thin seet and store it until needed. It is overall a bit more effective as a cold source than most other gel packs on a volume for volume basis.
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