I don't, here's why. The peels and "pith", the white part of the peel, make the drink bitter every time I've used a blender. To prevent that, I peeled the limes first, which is more fussy to me than just juicing the limes in the first place and kind of defeats the purpose of using a blender to make it easier. I just make it the traditional way to guarantee it will be delicious every time and not bitter!