The 3rd generation Molecule with some small user friendly modifications is here. The changes include stronger screws, top cap is not as tight or hard to remove, and the housing is further prevented from being able to contact the quartz due to slight manufacturing tolerances. Vortex Air Flow Control with 510 drip tip (mouthpiece), glass 510 drip tip, flattened coils, bubbler adapter and more can be found under Cotton and Tools. (Colors may vary based on the screen you're using) Purple is brighter in person. Patents pending - The Molecule rebuildable concentrate atomizer was developed over several prototypes with extensive testing. If you like dabbing or are looking for a portable solution with performance, longevity, affordability, quality, and flavor in mind, the Molecule RDA is for you.