I have a tin can that says earthquake in a can.  when you pick up the can it shakes and trembles and when you set it down,  it trembles and vibrates untill you calm it with your hand.  Somebody in China, Hong Kong, Japan, or Taiwan has made this product before.

Looking for the manufacturer who makes it. 

I can not really read the lable on the one can I have, but I can make out: "San Francisco Earthquake in a can.  I believe it was made for the dynmo Company at one time. You unscrew the bottom of the can and that is where the battery goes.  Thanks for your response...