A glass or plastic container, commonly known as a bottle, used to hold liquids, water or other beverages for consumption has been used since time immemorial but have you ever noticed a dent at the bottom of jam jars, wine bottles or even your favourite Nutella jar. The splendour of the design will astound you into thinking as to what could have been the possible rationale for this exemplary concave bottom. Things aren’t what they seem at first sight and this seemingly futile dent is an absolute demonstration of it. It is not only a design feature but suffices certain functional purposes too. Well, here are some answers to Why do bottles have a concave bottom.
Why do bottles have a concave bottom?
Due to the high pressure in which the jam or wine is kept, it might burst, but a dent adds strength to the base of bottles and jars. Also, it keeps the content fresh and intact. Besides, it increases the surface area of contact between the content like ice and wine thereafter keeping the wine cool. Water can easily spread around the bottle which makes it simple to clean it. The dent provides more stability to the bottle and hence prevents it from resonating and toppling over, keeping it from falling to pieces during transportation or shipping.
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The conventional way of stacking wine bottles necessitates keeping the nose of one on the dent of another, which is why they always have a dent. In addition, it aids in the deposition of the sediment around the circumference of the dent in the bottle, thereby forestalling the deposit from getting mixed with the content. This elucidates why exorbitant wine bottles, jam and Nutella jars have a deeper dent than their cheaper types. The dent acts as a speck where you can place your thumb or palm and use the other fingers to wrap around the base which makes it easier to hold the bottle.