I like adding dried hibiscus to tisane or to brews because I enjoy the taste. My mother in law does this hibiscus and rum mix, where she freezes it and stirs it up, so it's granular, like a slush drink, and oh so delicious. I think she adds honey to sweaten it.
That sounds really interesting!! I don't drink, but my son likes rum. I have to tell him about it!
Oh, if he likes rum, he's going to like this :p