Hand warmer (re-useable and large!)
Re-useabe gel handwarmer.
Larger than many, these hand warmers release loads of lovely heat to keep you warm and toasty. Simply flex the metal disc inside to release at least an hour of lovely heat!
How might I use these?
Great for warming hands when you're out in the cold (or in Outdoor STEM sessions!).
These are also great for using in experiments where you need a safe source of warmth, or simply to see an exothermic chemical reaction in process! The metal disc click triggers an exothermic (heat releasing) reaction: watch the crystallisation of the gel spread as it releases heat energy!
To reset and make it ready for use again, simply wrap in a tea towel and place in a pan of boiling water for about ten minutes until all the crystals are gone (detailed instructions are printed on the handwarmer).
Weight: 194g (unpackaged)
One Re-useable gel handwarmer in cardboard box and sustainable packaging.
Wrap in a sock or glove and keep in a pocket to make the heat last longer.
These are also great tucked down a welly boot if you're prone to cold feet!
Free to collect from Outdoor STEM sessions in Sheffield (term time only): simply choose this option at checkout).
Free delivery on orders over £12, or £3.50 if under.
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