I buy 20$ pound bags of pipe tobacco that last me for a month and a half. I have seen some eliquids canisters advertised at about 14$ how long do these last? I know its relative to how often the person puffs and how big of a puff they take but on average how long does a typical container last because if im going to invest in an expensive electronic like an ecigeret that already has parts that have to be replaced I expect the liquid to last as long as my 20$ 1 pound bag of tobacco.