Bottles are not made with hard plastic.

We often buy these plastic water bottles but do not know the logic behind the lines formed on the bottles.

Different brands carve different designs upon the bottle.

These designs are made for branding and an attractive outlook.

But actually, they are made to provide stability and strength to bottle structure.

The bottles are made with soft plastic and are prone to bend easily, but these lines offer solidity.

These lines also provide a nice grip.