Step 1: The goal during newborn transfer is to avoid hypothermia, which is dangerous for neonates. We want a heat source that is constant, safe and does not depend on equipment.
Step 2: Holding the infant skin to skin on a parent's chest, the kangaroo position, gives a steady supply of body warmth. The mother is preferred, but the father can also provide it if she cannot accompany the baby.
Step 3: Compared with an incubator that needs electricity, a passively insulating thermacol box, or a hot water bottle that can scald, the kangaroo method wins on safety and availability.
\[\boxed{\text{Kangaroo Mother Care (KMC)}}\]