What causes a circular dent in milk jugs?

Answer by  boxsofrain (207)

It is very possible the circular dent was caused by dropping the jug. It will causes pressure to the jug which will make the plastic split. You may not have dropped the jug, it could have happened during shipping.

Answer by  meena (400)

When the milk jug is full and the bumping out of the air circulation can cause a dent in a milk jugs.