This unique bubbler is made from durable borosilicate glass and it is shaped like a pair of brass knuckles. Because of the knuckle shape, it is a nice bubbler to hold in your hand. You can use it at home or take it on the go with you. This bubbler can be used with blunts and cones. Using it is simple; just add a bit of water in the bubbler, load the bowl with your blunt or cone and fire it up for a quick, hassle-free hit! You can also use herbs with this device, however we do suggest using a screen to prevent herbs and ash from traveling into the bubbler and befouling the water.