Have you ever noticed a dent at the bottom of wine bottles, jam jars and even your favourite Nutella jar? These days even normal mineral water bottles have it. This seemingly useless dent is not only a design feature, it has functional purposes as well. Remember that one time when you balanced a bottle on your fingers? Well, this small dent was working hard to make sure the bottle does not fall off. But, has it ever crossed your mind if there are more reasons why most bottles and jars have a dent at the bottom?

Optical illusion also saves up to 57 grams of the content inside the bottle, thereby deceiving you to think that there is more content than there actually is.

It adds strength to the base of bottles and jars, keeping them from bursting due to the high pressure in which the wine or jam is kept. It also keeps the content intact and fresh.