Customized Camping & Outdoors, Reusable Magic Hand Warmer Round - 300 Uses, Activate by simply flexing a small metal disk inside the hand warmer that will product heat Stays warm for 15-25 minutes To reuse, submerge in a pot of water and boil on stove for at least 15 minutes, or until filling is completely liquid and clear again Can be used up to 300 times Instructions are printed on items ... #WTV-MR16 $2.43/each.
