The first 'reaction' that we tried for our hand warmer involved dissolving potassium carbonate (K 2 CO 3) in water. Potassium carbonate is one of the chemicals left behind in the ashes of burnt wood.

These hand warmers are hands-down the nicest looking option you can find, with a teardrop shape and several stylish colors, including a "city garden" floral pattern. Depending on which you opt for ...

Hand warmers come in different varieties ... Tip: If using plaid flannel, follow the lines in the pattern for even cuts. Photo credit: An Off Grid Life. Photo credit: An Off Grid Life.

To enable this, [Greg] 3D printed a small crate with plenty of vents, into which he stacked six hand warmer sachets. An egg was nestled in the center – a perfect choice as it can be cooked in ...

Now I've ditched the powdered packets in favor of rechargeable warmers -- specifically, a pair of Oocoopa UT3 Lite Magnetic Rechargeable Hand Warmers. With USB charging and multiple temperature ...