Dairy company Anchor has been milking the benefits of its new light-proof plastic bottle, but a Whangarei teen may cause them to have a cow.
Pompallier Catholic College student Anya Gross, 13, launched an investigation to see which milk bottle would take the longest to break down under direct ultraviolet light - glass, standard plastic or Anchor's light-proof plastic bottle that was introduced with much fanfare and the company claiming a "world first" innovation when they hit the market in April.
Anchor - a division of dairy giant Fonterra - said at the time the new bottles will keep milk fresher for longer and "is the only way to protect its fresh taste".
But Anya's findings showed no difference between the old plastic or new light-proof bottles.
It took three days for milk to ferment in both, while milk in the glass bottle went off after one day.