The ICIG-R is the largest unit that ICIG has to offer.  With an ICIG-R electronic cigar cartridge containing .79 ml of fluid compared to the Jack electronic cigarette at .5 ml and the diminutive Spade at .19 ml. The ICIG-R has much more fluid which translates into a far longer smoke between cartridges. The ICIG-R is a larger more manly unit -- with durability that can only be described as toughness.  The one cigar flavor is described by some to be a stronger smoke.  If what you are looking for is a healthier way to experience the sensation and flavor of a cigar, then the ICIG-R is for you!