Gross Skin-Looking Thing Found In Vitamin Water

Jenny writes:

I was just drinking a bottle of Vitamin Water and there was a really gross thing in it. Industrial byproduct? Paper? Human skin? (See attached photos) Any ideas as to how I can figure out what the thing is and if its contact with my tongue is going to kill me? I have emailed the company.

What the heck is that thing?! Another picture, held aloft to the light, inside…