For the fourth installment of the Artist Series, Grenco Science reached out to HUF to produce this limited edition G Flask. To the uninitiated, the flask case looks nothing more than a small book, yet once it is opened up, it reveals the G Flask hiding inside. On top of that, this flask stores a microG portable vaporizer, microG USB wire, microG tool and funnel on the backside of the highly polished flask. Each item packaged in this collaboration comes with double brand logo on the exterior, authenticating the collaboration. Jump over to Grenco Science online shop to pick up this awesome flask.