Diet Irn-Bru comes in similar packaging to the familiar
Irn-Bru bottles and cans, albeit with more white and less orange, and 'Diet' in large handwritten script.
Unlike many 'diet' or 'lite' versions of soft-drinks, it's a pretty decent facsimile of its sugar-loaded namesake; only a slight lack of body gives away the fact that this is not The Real Thing. Otherwise, the familiar
bubble-gummy,
fruity flavour and rusty-orange colour are present and correct.
Another trait inherited from its big brother is the moderately high
caffeine content; whilst it doesn't begin to compete with strong
coffee (nor, I'd guess,
Jolt Cola), it provides a pleasant, gentle
buzz, which probably explains why I went through so much of it whilst studying for my
finals.
Contrary to
xlucid's writeup, Diet Irn-Bru contains a
negligible 0.7
kcals (i.e. Calories) per 100ml (this has been the case for the past few years, at any rate). Unfortunately, accompanying your Diet Irn-Bru with that other Scottish delicacy, a
Deep Fried Pizza supper, is likely to cancel out this benefit, and then some.