Brass knuckles Glass knuckles.

The Pulsar Knuckle Bubbler makes for a fantastic accompaniment to the blunt, pre-roll, or joint of your choice! This piece fits most rolls, adding water filtration for smoother hits all around. This accessory has an easy-to-grip design that's perfect for a leisurely solo sesh or passing around with friends. Not only does this cone holder offer more enjoyable smoke, it also prevents the tip of your rolled goods from getting moist or clogged during a sesh and keeps more of the smell off of your fingers. Fresh out of papers? This bubbler can also be used as a one hitter pipe, complete with an ergonomically placed carb hole just below the mouthpiece.