"This ghost cat bubbler is designed to be used with water for smoother hits Built-in slotted downstem provides superior smoke filtration Fill the water approximately 2" on the inside. To test if you have enough water, add water, inhale & if you don't hear bubbling add a little more water. Try again until you hear bubbling. Add your herbs to the bowl and enjoy Large mouthpiece for filling water and cleaning Made of ceramic with a food safe glaze on the inside and outside 5" tall Carb is on lefthand side of the bowl For instructions on how to clean this bong CLICK HERE Intended for tobacco use only"