Sia Pvc 9cm Dog Pocket Stove - Hand Warmer & Whistle Water Bag

How to use: snap the metal coin inside the package with your hand.

the metal chip acts as a catalyst, after which the gel will solidify. The temperature will gradually decrease after 30-40 minutes. when it is completely cooled, heat it in boiling water until all crystals turn into gel (5-10 minutes).

you can use the heater over and over again as long as there is no cut or tear, no broken chips.how it works You snap the metal inside the gel.

our metal chip acts as a catalyst. As a result of the reaction, liquid sodium acetate salt turns into a solid and gives off heat during this phase change. this heat rises up to 50 degrees and the reaction continues for 30-45 minutes.

later, we make the solid-state cooled heater, boiling, to become a gel again and a potential source of heat.