I don't know what FFS is either - but now I have to go mix up some orange juice cocktails - it's 5 o'clock some - hey, here! 
Tried coloring one with a red sharpie, but that didn't work. I'm thinking enamel or something. Anyho, I'll let you all know how they vape when they're done charging.

)
). It's really lightweight! Haven't been using it long enough to tell about how long they each last, but I'm diggin' it.
The Daisy, what are you running on it?