Crack cocaine

A less sophisticated but common method is to use a discarded soda can and puncture several small holes on the side of the can near its bottom. " As the "rock" is heated, it melts and heats into vapor, which the user inhales as smoke.

A small piece (approximately one inch) of clean heavy copper or occasionally stainless steel scouring pad—often called a "brillo" or "chore", from the scouring pads of the same name—is placed into one end of the tube and carefully packed down to approximately three-quarters of an inch. Upon injection, cocaine reaches the brain in a matter of seconds, and the exhilarating rush that follows can be so intense that it induces some users to vomit uncontrollably which causes bleeding of the esophagus.