I just spoke with Polar on the phone and the official word is that the INSIDE of the new pretty colored bottles is exactly the same kind of plastic as their previous styles of bottles.

The outside plastic is a bit different but since it is on the outside it shouldn't affect the taste...

The Polar rep I spoke to suggested washing in the dishwasher if you haven't already done so. Also, different manufacturing lots of the exact same formula of plastic can have varying amounts of smell, but they should all diminish quickly after a run or two through the dishwasher.

If you've purchased a polar bottle from TE we'll be happy to do a warranty exchange for you if the dishwasher and/or baking soda volcano doesn't do the trick