Spoons Pipes are widely used and are recognizable for their simple design. One end is a spoon-shaped bowl into which you pack your cannabis. There is a small hole at the bottom of the bowl that allows smoke to travel from the spoon end down into the body of the pipe. Somewhere adjacent to the bowl is another small hole, called a “carb.” You control airflow inside the pipe by covering or uncovering the carb with your finger. Finally, the body of the pipe extends out away from the bowl and carb, ending in a third opening, which is the mouthpiece.