I have just started dripping this past 3 weeks but the bottles that I get don't really last as long as I'd like 30ml at 3nic lasts me about 5 days and 30ml at 6nic lasts me about the same. the other problem I have is that id like to go higher on the nic cuz 6 isnt enough for me. I started with an ego and 24nic in January and never went down so for dripping id like to try somewhere above 12 but still have the bottle last me a while ...someone suggested that I buy a 30ml in highest level nic (is 36 I believe) then add my own vg to cut it down to around 12nic which would give me more quantity (juice wise )in the process