Propolis is also known as "bee glue." The bees use it in the interior of the hive to reinforce hanging comb, lessen vibration, and control the airflow within the hive. they make it from tree sap, beeswax, and honey.
 
Most people enjoy eating it for its health properties as it is high in antioxidants and believed to act as a natural anti-inflammatory. You can chew this resin-like product until it dissolves or you can make a tincure from it.