The map tank is from cloudsofvapor.com. They are hand made so not always in stock. I ordered one and it has yet to arrive. I think it is lost in the mail. The ego tank has a little tank that you fill and pierce and it does the direct dripping for you. My understanding is that the little plastic tanks are reusable to some extent. The map tank is a different animal all together. It is a circular tube with a cut ce2 from a cartomizer inserted into it. The tank holds 5 mls where the ego t holds 1.2 if i remember correctly. The part that has to be replace on the map tank is the ce2. I was told they last 1-2 months. They are about $5 each precut or $11 for 5 that you would have to cut yourself.
There are some great youtube videos on both of these and i would reccomend checking those out before making a decision.
