If you put a coin in an empty bottle and insert a cork into the neck of the bottle, how could you remove the coin without taking the cork out or breaking the bottle?
if i wanted to accomplish this i would take a cork that was a bit smaller than the bottle neck and soak it in water for a few days thus making it large enough to fit into the neck ,once the cork dries it would get smaller again and simply drop into the bottle enabling me to retrieve my coin
water absorbed cork
