Can Cotton Balls Transfer heat?

Me and my mother had found these bird eggs it a lovely bush just in my front yard. The mother was killed by an agressive male sparrow and I managed to keep it away from the eggs. Me and my mom grabbed medicane bottles. I stretched out some cotton balls and stuffed it in the bottle, leaving a hole where the egg... show more Me and my mother had found these bird eggs it a lovely bush just in my front yard. The mother was killed by an agressive male sparrow and I managed to keep it away from the eggs. Me and my mom grabbed medicane bottles. I stretched out some cotton balls and stuffed it in the bottle, leaving a hole where the egg would be put. I m carrying one egg while my mother carries the other two. Bit I m worried about the cotton not being to transfer heat. Should I be worried?
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