@rms1954 wrote:
Now I have found I need to go back to return a carton of chicken stock and when I removed the plastic screw top the foil underneath the cap was broken. I probably won't bother.
@rms1954
The cartons are designed so when the top is twisted off the foil seal inside is broken as well. You can tell it hasn't been previously opened because there's a slight resistance when twisted off for the first time. It's not a defect, it's a convenience.
If you do decide to return it I'm sure an employee will demonstrate with another carton. Hope this helps. 
I first discovered this with a carton of their Tomato and Roasted Red Pepper soup several years ago.
Btw...the soup is delicious!
