various sizes are available release instant heat when you bend the inner metal disc reusable hand warmer

Hand warmer

1.size: various sizes are available    

             

2.it can release instant heat when you bend the inner metal disc     

                      

3.reusable, non-toxic, non-caustic

4.OEM and customer design is preferable

5.suitable for promotion, gifts, camping, personal care and so on

User introduction:

To active: gently bend the disc inside hand warmer back and forth until the crystals begin to form.        

            

Reuse: wrap the solid hand warmer in cloth then put into boiled water until all crystrals melt (appr.5 min.).