TANK is precisely filled with 1 gram of highly potent, premium cannabis oil that tests between 87-92% THC and offers an incredible, flavor-forward experience with the infusion of botanical terpenes. Dive into the depths of delicious flavors from bold blueberries, fresh soil and dank earth with Blueberry Underground. TANK’s All-in-One Vape Pens are easy to use, more discreet than ever, feature a ceramic heating element, and a rechargeable battery.