Just found out the carts I've been buying from these guys have a COPPER core. COPPER is a HEAVY METAL. No wonder I've been having headaches on this stuff! Heavy Metal Poisoning is NO JOKE and all too easily done in the vape game. Don't these dealers know that when one ascends to vaping, they choose to because it's purest? We need to HOLD THESE COMPANIES & DISPENSARIES accountable. NO HEAVY METALS period. Epic selling point! There are ALL QUARTZ GLASS carts (BBTANK, O2Vape, etc.) that can be used instead. NO EXCUSES! Once they phase the heavy metals out, Bighorn Weed Co. can let me know with their Review Response and I'll change it back to a 5 Star.