A simple, almost CHILDISH experience:

Two laboratory bottles made of thin glass (designed for blood analysis with a radioactive isotope of technetium) are placed in a bowl filled with water and themselves filled with water up to the neck. There are no lids covering the neck. One is in its “natural form”. The other one is wrapped with sticky paper tape and there is also black insulating tape on top. So, they stand, being submerged to the very outlet of the neck in water and themselves filled to the same level with water. We put them in the freezer for a day.

Then we select.

Question: What will we see? A piece of ice with frozen bottles in it, which also contain ice.

But what condition will the bottles be in?

I emphasize that both are immersed up to their necks in water, that is, when the water freezes in the freezer, they are both surrounded by ice, despite the fact that ice forms inside them.

As you know, ice has a lower density than water, and, expanding during its formation, it is able to develop high pressures that split even thick glass bottles. But here, although the glass is thin, both are immersed in water, which also freezes, and before the bottled water freezes.

Those who wish can express their opinion. They will be greatly appreciated.

The answer based on experiments performed several times, with explanations I will give as soon as possible!

17 X 2026