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 ... about 40 minutes 2.Non-toxic,non-caustic.disposable.Instant Hot Pack Function:1.Easy to use,can reach 43 C. long ... rupture.2.Shake to mix contents.Application:1.This instant hot pack can release heat within 5 seconds,conveniene to use while ...