I'll add my vote for Voodoo wool,even though my drippers juice well is tiny,two little chunks (approx half inch) holds enough juice to give me about an hours worth of satisfaction.It does depend on the nicotine strength though,as my 10 mg mixes vanish at the rate of 10 ml per day yet the 18 mg mix allows me to blow a hole in my brain such that a few drips is headache territory.Gets tricky with different strengths of the same flavour in identical bottles,so NOW they're getting a label.
Now I'm here,I'll go look at Peppers dripper threads & see if I can gain anything