When I think of Miruvor I always think of the tap water here as it's beautiful, pure and cold! I certainly don't think of brackish Mordor water; that always conjours up an image of when you see puddles in cow fields, full of, well, what cows leave lying about! And flies.
Lembas is always something like butter shortbread, or maybe Kendal Mint Cake. The orc draught makes me think of Benylin cough mixture (and I wonder if it also bestows mad dreams on the Hobbits).
But pipeweed.... As soon as I read about it I feel like I need a smoke.

If I am watching a film with lots of smoking in it (surprisingly rare these days, to see smoking in films...) then I end up with a cough by the end of it as I automatically reach for those tobacco products.