What is this wonderful juice?

It's like every fruit and vegetable mixed together!

It's unpredictably delightful.

Sometimes it's sweet, but others salty.

It's never clumpy, it goes down softly.

I swish it around in my mouth, let it dribble down my chin.

I don't care what happens as long as I can get more of this liquid in.

I've offered friends my drink before, but friends they are no more.

I wonder why you'd lose your lunch over a treat I so adore.

What is it about my snack that people just abhor?