DIY Baking Soda Handwarmers




Introduction: DIY Baking Soda Handwarmers

About: Wassup people. I'm da Happy Mad Scientist and I'm a 18yr old [genius] that loves to make freakin cool stuff (eg. night-vision cameras and hydrogen generators). And hey, if said "stuff" goes BOOM, it'…

Hey everyone!!! It is December and getting colder and colder and colder. Ughh. Cold fingers can be very very painful and these cheap homemade hand warmers are easy to make, reusable, and very effective. (They heat up to about 140°F !) This warms up due to the freezing of the sodium acetate (a.k.a. hot-ice) and uses only baking soda and vinegar!

Step 1: Ingredients and Supplies


-Baking Soda


-Mabey some water


-Small Pot or Saucepan

-Stove or hot plate

-Stirring device

-Temperature resistant plastic or temperature shock resistant glass

-Plastic baggie

Step 2: Mix Ingredients and Concentrate Mixtures

Mix vinegar and baking soda together slowly. 1 Tablespoon of baking soda per 1 cup of vinegar. The reaction will produce water and carbon dioxide. Boil on medium heat until there are white crystals forming on the edges of the pot and the fluid is dark yellowish brownish. Pour into heat-resistant container, cover it, and put in refrigerator to cool. When the solution is cool transfer to the desired reaction container, in my case a plastic baggie. The handwarmer is now complete and ready for use.

Step 3: All Done!!! Enjoy!!!

To activate the freezing, stick your finger or something else into the solution. The freezing of the sodium acetate should make lots of heat to warm your hands. To reuse put the solid "ice" into the pot and melt. Once it cools down it will be able to be put back into the bag. Thanks for reading and I hope this was of use to you!

Disclaimer: Do at your own risk. Please do your own research and learn the risks associated with the chemicals used in this experiment. Beware of hot surfaces and substances that have the potential to burn.

Hows that for a disclaimer :)

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    5 years ago

    I used to use these type hand warmers all the time when hunting. They do get pretty warm, but after a few cycles, they seem to loose their abilities to work for very long. But nice project anyways. Always nice to use them...


    Reply 5 years ago

    Have you tried adding a small amount of water when you remelt the "ice"?