Gelert Re-Chargeable Gel Handwarmer
The Gelert Gel handwarmers are liquid filled tough plastic pouches that give out heat when the little metal disc inside is clicked, this sets off a reversible chemical reaction the bi-product of which is heat, this is very useful on cold winter days for numb hands, the liquid inside then goes solid and white. To reverse the reaction and thus re-charge the gel handwarmers you simply boil the pouches in water until the solid liquifies and goes clear, this takes 15 minutes. Each use gives around 40 minutes of heat.
Sold in a pack of two. The Gel Hand Warmers may be round not square.