jmcquown wrote:

You've gotten some good answers. I asked a while back why a glass filled
with ice and water added doesn't overflow when the ice melts if you don't
drink any of the water I can't for the life of me remember the answer
and am too lazy to Google for it. It just seemed a curious thing to me.

There is a similar question about a boat full of iron ore sinking in a canal
lock. The water level does not change because floating objects displace water
equivalent to their weight.