PVC has historically been found in vessels and tubing for intravenous fluid. I was, incidentally, reading this morning about the safety of PVC in blood transfusions and no ill effects have been reported in humans, according to the text i was reading.
Animal studies have shown that PVC fragments from IV tubing has led to cardiac arrest in rats, kills minnows and causes cellular damage to mammalian cells i
n vitro.
So it's probably safe unless you're storing minnows in your bladder or watering your rats from it
