Diet Coke has been around since the 1980s, and it is still a bestseller in the low-calorie drink market.
However, at £1.77 per two-litre bottle, it's not exactly cheap. We wanted to find out if there's a supermarket version that tastes just as good.
Here's what happened when we tried diet cola from Tesco, Asda, Sainsbury's, Morrisons, Aldi and Lidl.
