flavoring from mt baker vapor is notoriously good and actually pretty cheap. i'm hesitant to DIY, as i'm already so critical of vendor juices and i know i can't do better. from what i've found MBV's juices (green apple, ecto cooler, spurberry, pear, various coffee flavors) are ridiculously well priced for the quality and i'd rather pay that small price every month than spend time fiddling with something besides wire and mesh.