An ice pack, or cold pack (or, in specific cases, gel pack), is a portable bag filled with water or another liquid, or refrigerant gel, meant to provide cooling. They can be divided into the reusable type, which works as a thermal mass and requires freezing, or the instant type, which cools itself down using chemicals but can only be used once.
An ice pack, or cold pack (or, in specific cases, gel pack), is a portable bag filled with water or another liquid, or refrigerant gel, meant to provide cooling. They can be divided into the reusable type, which works as a thermal mass and requires freezing, or the instant type, which cools itself down using chemicals but can only be used once.
Source: Wikipedia "Ice pack" · CC BY-SA 4.0
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