I feel like an idiot right now.
@Schaefd2 tipped me off to a red thumb screw near my work which I grabbed. The guy was giving me their old charcoal too and he pulled a bag of KBB out of a steel contraption like that. I didn't even think to just ask to take it with me or if he was going to sell it. I'm guessing they threw it away while cleaning out the house.