How to open the hot water bottle caps.
When the bottle by air in the outside temperature, atmospheric pressure from pressure difference with the outside world. When heated and cap is better than original swell. And the bottle should be greater than the outside air in air pressure, it like we usually use the pressure cooker, if improper operation will make spray pot; For spray cap will create a slight effect. Finally is the difference in air pressure caused by the dual factors of thermal expansion and bottle caps.
Heat bilges cold shrink. A bulge pouring hot water bottle caps.
First pour cold water on the cap (heat to cold), then find a dry towel pad in hand, hard to open. It's better if lid ring, can make use of lever principle open (don't forget to pour cold water)
