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2. Ice pack - Wikipedia

   en.wikipedia.org/wiki/Ice_pack

   An instant cold pack is a single-use device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it dissolves the solid in an endothermic process .

3. Hand warmer - Wikipedia

   en.wikipedia.org/wiki/Hand_warmer

   The hand and foot warmer was first patented by Jonathan T. Ellis of New Jersey in 1891, [1] though no evidence exists that it was ever produced. [2]The first commercially produced hand warmer was created by Japanese inventor Niichi Matoba.

4. Self-heating food packaging - Wikipedia

   en.wikipedia.org/wiki/Self-heating_food_packaging

   Self-heating rice with quicklime and water as heating source, taken before adding water to quicklime. The source of the heat for the self-heated can is an exothermic reaction that the user initiates by pressing on the bottom of the can.

5. Walgreens is Closing 1,200 Stores Nationwide - AOL

   www.aol.com/finance/walgreens-closing-1-200...

   Walgreens plans to close 1,200 stores by 2027 as part of a cost-cutting strategy amid rising competition and lower profits.

6. Thermal energy storage - Wikipedia

   en.wikipedia.org/wiki/Thermal_energy_storage

   Instant cold packs absorb heat by a non-chemical phase-change such as by absorbing the endothermic heat of solution of certain compounds. The one common principle of these other thermal batteries is that the reaction involved is not reversible. Thus, these batteries are not used for storing and retrieving heat energy.

7. Heat pack - Wikipedia

   en.wikipedia.org/wiki/Heat_pack

   A heat pack is designed to warm up one's body to prevent swelling of injuries. A heat pack can be: A heat pack can be: an ice pack that is heated (containing a liquid or a gel with high specific heat)