Comforting Warmth Thanks to Salt

The water in the hot water bottles stays warm longer if you add a little salt to the water before boiling it.


Comforting Warmth Thanks to Salt

This works because salt in the boiling water increases the temperature by eight degrees and makes sure that it cools down again at a slower rate. However, take care: boiling water may not be filled into every hot water bottle - pay attention to manufacturer's instructions.