“This is a huge thermos that allows you to store heat when it is not needed.

And can allocate it when it is needed,” said the head of the German branch of Vattenfall, Tanya Vilgoss.

The company added that the reservoir will help heat houses in Berlin in the winter, even if Russian gas supplies run out.

The text claims that the "thermos" 45 meters high can hold up to 56 million liters of water.

Earlier, the Federal Network Agency of Germany reported that the situation with gas in Germany is tense.