food in tubes?

So I was walking on campus yesterday and I caught only half of some girl's conversation, but it was enough to boggle me 24 hours later...

"...and she used the whole tube!! I mean, I told her she could use it to make her chicken salad, but she used ALL of it!"

Now, I don't eat meat so maybe I can't remember what goes in chicken salad-BUT I still can't think of anything that comes in TUBE form that would be an ingredient.

Any ideas?