prov:value
| - In various aspects of the present disclosure, the cool portions 118 may be formed using suitable endothermic sources that absorb heat during dissolution upon contact with an aqueous solution including, without limitation, salt hydrates such as sodium acetate, sodium carbonate, sodium sulfate, sodium thiosulfate, and sodium phosphate; anhydrous salts, such as ammonium nitrate, potassium nitrate, am
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