For those who have ordered Spare attys from Blu, do they come with an empty cartridge or mouthpiece on them at all? I am considering ordering a set, as they fit a 510 battery and are $5 a piece effectivly. However, I dont have a mouthpiece or anthing that will fit over them. Most attomizers come with a mouthpiece or a cart with no filler or juice so i figured I'd ask before ordering, just to be sure.