THCB Bubble Runtz 2G Disposable Bubble Runtz (Hybrid): Grape bubble gum takes center stage with this strain. Sweet and tangy, with just a touch of pine and skunk, and notes of cherry and blueberry all wrapped up into one pull. THCB THC-B is a phytocannabinoid (a naturally occurring analog of THC). This cannabinoid is more potent than Delta 8 or Delta 9, but not as strong as THC-P. This hemp derived cannabinoid has a variation called D9-THCB. D9-THCB is similar to Delta 9 THC and shares the traditional effects of Delta 9 THC. THC-B is sativa like and produced in a similar process as Delta 8 THC.