KEY POINTS:
Overseas criminals are hiding drugs used to make methamphetamine in the pink filling of biscuits in a bid to flood New Zealand with P.
Customs New Zealand released photos of biscuits sent from China by express mail, which were intercepted at the border last October.
Twenty packets were stopped, with the pink filling laced with pseudoephedrine, the main ingredient in methamphetamine.
Charges have yet to be laid, but Customs investigations manager Paul Campbell said the method showed the lengths criminals went to to import the lucrative substance.
As little as 10 per cent of pseudoephedrine is stopped at the border, the rest is sold on the street. Nearly $4 billion of the drug - extracted from common flu tablets - has slipped into New Zealand in the past four years.
Most is imported from China, where over-the-counter medicine Contac NT can be bought for as little as a few dollars a packet, then on-sold in New Zealand for huge profit.
