A Gravity Bong (also known as a waterfall bong or bucket bong) is an apparatus constructed for consuming cannabis. The gravity bong is made of two containers. Traditionally, these containers are glass, but plastic products can be subsitituted, as well. The large container has an open top and is filled with water. The smaller container has an attached bowl and an open bottom. The user lights the bowl and lifts the container upwards, creating a pressure difference. Due to this pressure difference, smoke slowly fills the smaller container until the bowl is removed and the user inhales the captured smoke.