Obviously putting it in the freezer will keep it from melting. Other good insulators are: - Styrofoam - Bubble wrap - Copper
Your starter solenoid is sticking. Replace the starter solenoid and you should be good to go.
You could keep it in a freezer.
Rubber itself does not keep ice from melting for a long time. However, rubber containers with thick insulation, like coolers, can help keep ice from melting by reducing heat transfer from the outside environment.
You eat it!
to keep them from melting in your hand
put it in the freezer
Solenoid the starter is stuck would be my suspicion.
Put it in the freezer .
I think the outer core
I think the outer core
probably if you keep it in the freezer