Camping Water Jugs How Do I Get The Old Water Smell Out Of A Jug?

How do i get the old water smell out of a jug? - camping water jugs

Closed last year when we went camping someone left a small amount of water in a jug with water and with the lid and put it in the garage. However, as the old form, the water absorbs unpleasant! How do I get the smell out?