To have interaction with Styrofoam or to see Styrofoam when you are dreaming, is interpreted as suggestion that you are undergoing some form of transition in your life. In particular to see a Styrofoam cup, when you are dreaming, can be interpreted as symbolism that you have a belief of insecurity. Maybe you do feeling insecure or unstable in a relationship.
Styrofoam dream meaning
Read more about dreaming of Styrofoam in other dream meanings interpretations.