Vintage Flask
Everyone of us had seen a flask like this before during our childhood time. The attractive and shinny metal surface gets my notice as I remembered that my grandmother would boil water and store them in this kind of flask.
The brand of the flask is sunflower brand and this flask shown here is a plain red design flask. Besides this, there are other flask that comes in many different designs too.
The outer surface of this flask is made from metal and in the inside is made from glass. Flask like this, do rust easily especially the outer surface. In order, to prevent the hot steam from coming out, there is a flask stopper in order to secure the hot water and steam inside. The stopper is made from aluminium and is often coated with a cloth to give an overall tightness which will create a strong vacuum inside the flask.
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