Grenco Science and Cypress Hill Rapper B Real Introduce the Dr. Greenthumb’s X G Pen Connect Share Article LOS ANGELES (PRWEB) February 23, 2021 Grenco Science, maker of G Pen, and iconic Cypress Hill rapper and entrepreneur, B Real, expand their co-branded product line to introduce the revolutionary Dr. Greenthumb’s x G Pen Connect in B Real’s signature green and gold. An unprecedented alternative to conventional concentrate consumption, the Dr. Greenthumb’s x G Pen Connect delivers high-density, quality vapor production simply, safely and with ease. The Dr. Greenthumb’s x G Pen Connect launches in stores nationwide as well as at all Dr. Greenthumb’s retail locations and online at gpen.com/DGT.