Heaven, you have shown what is my understanding of the transportation of fire in the remoter periods of human history. It is understood that a hollowed out section of tree trunk about 5 inches in diameter with a lid would suffice as a pot ---the wood being an insulator.The fungus apparently smoulders for a long period of time and with suitable kindling and blowing upon can be readily revived.
BUT................. Abraham and Isaac are just fictional characters..................................