Who invented hand warmers?

Answer The hand warmer was invented in 1923 by Japanese inventor Niichi Matoba. His hand warmer became known as the Hakukin-kairo, or butterfly personal heater. Japan's MyCoal Corporation invented the dis... Read More »

Top Q&A For: Who invented hand warmers

Can I get my hand warmers wet?

While getting hand warmers wet will cool them down and reduce their effectiveness, you can get hand warmers wet without worrying about electric shock. Manufacturers use low-voltage batteries and mo... Read More »

Hand Warmers Instructions?

Homemade hand warmers are incredibly easy to put together and relatively inexpensive when compared to store-bought hand warmers. They also make excellent gifts for friends and family members who li... Read More »

Are hand warmers toxic?

Most major brands of disposable hand warmers are safe and nontoxic, including those made by HeatMax, Grabber and Heat Factory. Hand warmers function thanks to a chemical reaction that takes place w... Read More »

Types of Jon-E Hand Warmers?

The Jon-E hand warmer is a venerable piece of personal equipment that remains useful more than 50 years after it was first advertised in men's magazines. Despite the development of other hand-warmi... Read More »