It's a very old French drink, I first had it in 89 when its was baking hot and I asked for a cooling drink in a cafe bar in the village of Pons.
Its called a few different names but Devil Mint is the idea, I call it Diablomont when i ask for it as that's what the first one was called that, it's amazingly refreshing but sweet as F so I'm limited on it, I looked up the price in the UK, £10, here €3.30.