I can definitely sense the balance of certain types of jugs.
To be clear, the design of the jug and in particular the design and placement of the handle might make one jug feel heavier than another one even though both have the same volume. It’s a perception and not a actual weight difference.
Growing up I was asked which was heavier, 50 pounds of lead or 50 pounds of feathers. Of course they both weigh the same but try picking up 50 pounds of feathers.