A water jug keeps water like how a jug should
But a water jug does not jog because if it did
The water jug's water will spill while it jogs

So what do you do with a water jug?
You may jog with a water jug while it has water
And this is useful because
While you are jogging with a water jug
The water in the jug will be useful after jogging
Then you will thank your water jug and maybe give it a hug