Like I said, I dont necessarily believe the plastic toxic thing, i'm just paying devils advocate.
Take salt, red meat or eggs for example. Every few years a new "research" comes out and says this or that is great for you.. or this or that is bad for you. Red meat is NOTORIOUS for this kind of thing. In the 70's, it was awful for you and you were going to die if you had X amount.. Then in the 80's and 90's it was great for you and was being pushed on the general public. Then in the late 90's, they decided it was good only in moderation (like everything else) and then started pushing the pork "other white meat" on the public etc..
My point is simply that we cant dismiss the thoughts of something because there hasnt been a pandemic of millions of dying snakes. There are many hazardous things in this world and many of them have very slow and not so obvious repercussions.
It could be something so minor as slightly accelerating the natural aging process and helps cells break down faster. It might only result in a year or two off the overall age of a snake and might not see many if any clues to even suggest it is harmful. See my point? Its not so black and white as YES YOUR SNAKE WILL DIE! or NO, my snake is the healthiest everzzz!
There is a gray area is all i'm suggesting. Bad things could come in very small and well hidden packages.
In closing, I just want to reverberate that I am NOT saying plastic is this evil killer as said in the article. I am only trying to show a different side of the ball that many might be dismissing to quickly. I hope me doing so isnt stepping on toes..