self-activated relief from headche, mucle aches disposable and instant ice pack SGS,MSDS,TUV,CE Instant Hot Pack 1.Easy to use,can reach 43 C. long tiem hot-last about 40 minutes 2.Non-toxic,non-caustic.disposable.Instant Hot Pack Function:1.Easy to use,can reach 43 C. long tiem hot-last about 40 minutes,2.Non-toxic,non-caustic.disposable.Use:1.Locate inner liquid pouch at the arrows and squeeze ...