HotHands and Grabber are just two of the brands manufactured by Kobayashi America. HotHands and Grabber are single use, disposable, air-activated heaters for your hands, ears, body and feet. Kobayashi has its origins in 1886 in Nagoya, Japan as a wholesaler for OTC medicine. Over 100 years later, Hothands were introduced to the USA, and have become the go-to brand for thin and environmentally-friendly body warmers. Just expose the warmer to oxygen and enjoy hours of battery-free heat. When done, just toss the warmer into the trash!