A customer saw Iceland’s new product in the store (Credit: Sarah Fletcher) Snacksters Big Stack burgers were spotted in Iceland’s freezers and shared on the Snack reviews Facebook Group. And the resemblance to Maccies has not gone unnoticed: “Wait a minute, they’re copying the Big Mac, I like that,” said one commenter. Another called it the “mcbig stack”, while many liked the sound of the £ 1.50 treat. “Oh boy,” one user said, while another just said “incredible.” The packaging of Big Stack burgers appears to be less than a million miles from the cardboard boxes McDonald’s uses for its Big Mac burgers.