> Sounds like some of you are old enough to remember
> what happened when it got cold enough for the cream
> to separate & push the paper cap out of the bottle.

> Not clear on the physics of that, but it was tasty :)

It keeps the fish alive.
Most materials contract when they freeze.
It just happens to happen [tm], that water expands slightly when it
freezes so that the ice floats. So oceans and ponds and cream bottles
tend to freeze from the top down. Tends to insulate the whole and
reduce prospect of pond etc freezing solid.

That way the fish and maybe the bugs in your cream have  a chance to surviv=
e.



             Russell
--=20
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