Many production vacuum caps are always difficult to open, is there no knock on the door may never be difficult to open the crown cap? Pour some hot water in the morning basin, the hotter the better, it is boiling water. Bake the crown cap along the beer cap with a lighter for 1 minute.
There is a black rubber ring inside the crown cap, which expands when heated, and with a quick break with your hand, the cap can come off. I think it's enough to pass the bottle cap, and here is our trick.
Put the crown cap down into the water, you see, the water in the basin just past the cap, wait half a minute or so, you may open the cap. With this time, I will tell you why this method can open the crown cap, this is because the object has the characteristics of thermal expansion and contraction, the metal bottle cap is in contact with hot water, rapid expansion, it is true that the glass bottle mouth will also expand when heated, but it is a step late, it is heated through the bottle cap. In addition, the food inside it is cold, so its expansion speed is far from catching up with the bottle cap. In this way, a gap will be created between them, which can be opened. Well, when the time comes, take it out and try it, and voila, it's easy to open it. With this method, the current screwing of the bottle cap is no longer difficult. It's hot water, it's easy. To open the bottle cap in this way, you do not need to pry, nor bake, do not have to worry about prying the bottle and hurt your hands, nor do you have to worry about baking your hands, let alone worry about the bottle cracking, very safe! This method also has the advantage that no matter how large the bottle, only head down, soak in hot water, and it can be opened slightly. In practice, this method is made and more or less likely to be opened. This is really the bottle cap can not be opened, hot water soaked, broken horse will be effective, open the cap becomes lighter.
