If u drip,straight lung.. If u have a RTA, KAYFUN ETC...mouth to lung/straight lung.. Now if u have a TANK like PT3 or AEROTANK mouth to lung,cause normally those tanks are always tight draw.. UNLESS you drill em or rebuild em.. Now if ur playing CLOUD CHASER and posting it on VINE,INSTAGRAM,YOUTUBE then you SHUT UR MOUTH...LOL