Nobody yet has mentioned another likely possibility that I've experienced.
I noticed when several of my jugs were lined up side by side, there was about 3/4 inch difference between fill levels, i.e. don't bet your life that a jug contains the amount of contents stated on the label.
I noticed when several of my jugs were lined up side by side, there was about 3/4 inch difference between fill levels, i.e. don't bet your life that a jug contains the amount of contents stated on the label.