Some people are cool with it, others not. It really depends on you - is this going to, in _any_ way, affect your sobriety? If the answer is yes, then I would personally avoid it. Just getting the taste of Rum could be enough to get your mind thinking again 'gee, I sure love the taste of Rum...'. Why even risk it?
Instead of simply making the pleasurable taste of Rum off-limits (and as such, a 'desirable no-no') and denying yourself without any rewards, the key is to replace that rewarding taste with something else. Find something else that's _really_ good and replace it with that. I personally like Odwalla juices and other fresh stuff. And of course... the almighty Cherry Coca Cola.