Gotcha. So in my willingness to sacrifice all for my FC colleagues, I chewed on a piece of Arizer's pvc tubing. Ugh, and kinda sharp on the tongue, too. But no taste. I am wondering about the odor, though. That can affect taste. Is the tubing still relatively new? At any rate, the silicone is just sooooo much better. Give it a try and pls share your results.