It may be dubbed the "most secure circulating coin in the world to date," but the new British £1 ($1.66) coin is going to cause a headache the size of a couple of million of the coins for the U.K.'s vending machine business.

Jonathan Hilder, the CEO of the Automatic Vending Association (AVA), which represents manufacturers of vending machines, said that the cost for British businesses to change the coin mechanisms to service the new coins would have a knock-on effect for vending manufacturers – as well as costing businesses vast sums.