Danger! If you use 2 Habanero peppers, this may be the last drink you're ever able to taste. I found that using 1/2 of 1 Habanero, sliced into 2 slices and muddled, was enough for 2 drinks, and still was at the high end of being a "pleasant burn"...so that's 1/4 Habanero per drink, not 2! Also, this recipe was not really enough to fill a Collins glass...topping it off with 7-Up/Sprite/Ginger Ale and stirring does the trick nicely. With these two tweaks, this is an excellent drink.