I have to agree with TeaEqualsBliss about this one, it does remind me of the powder-dry gum that used to be packaged with baseball cards (well, in my case, I collected the Wacky Packages instead of baseball cards, but you still got a stick of that dry gum inside).
It doesn’t really possess any notes that taste distinctively like “tropical” to me. It’s not bad tasting though… it’s just a bit different than I was expecting… and once I get past that, I find that it’s an enjoyable cup.