A gravity bong is a type of water pipe that pushes smoke directly into the consumer’s lungs. Utilizing water and gravity, these bongs work by submerging a bottle or chamber with a bowl of legal herb on top into a larger bottle or bucket of water. The bowl is lit and the bottle slowly drawn out, which fills the chamber with smoke. Then the smoker unscrews the lid, puts their mouth over the bottle’s opening, and pushes the bottle down. This action of gravity pushes smoke straight into their lungs.