How to Make a Cup Chemically Disapear




Posted in TechnologyScience

Introduction: How to Make a Cup Chemically Disapear

Styrofoam is a polymer and when brought into contact with
acetone the polymer breaks down into its monomers. This
demonstration show the process of depolymerization. It looks pretty cool.

Need a Petri dish (something that is not Plastic to hold Demonstrations in
Styrofoam Cup is placed into petri dish and 20 mL of acetone is poured in

Clean up let acetone evaporate, throw out cup gew.

acetone can be replaced with a number of different solvents like gasoline.



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    I'm not that great with chemicals and stuff like that, but what's napalm?

    3 replies

    put it in a pipe and make a wireless sparker... you will get a nice little boom


    No, it's just a thick, very sticky, slowburning and flammable liquid. Not an explosive and certainly not HE =).

    Makes "cheap" napalm not real napalm...

    you could also do that with mountain dew, or gas but the resulting substance is napalm like

    9 replies

    haha you cant do that with mountain dew.

    my 8th grade science teacher had a party before christmas break and sombody left a styrofome cup half full of mountain dew on the table that never got thrown away and when we got back he said it desolved the bottom

    Not all Mountain dews do that only the red kind.

    good so its fake


    goes of and drinks gallons of mountain dew

    not chemically possible...he's just yanking your chain for not cleaning up after your self.

    VERY VERY VERY COOL!!! but all i know about styro is if u cut it, its bad for the ozone... those any body know if this is eco friendly??? (not much of a chemist)

    1 reply

    its bad cause it releases a type of gas thats pretty bad,(i forgot what kind of gas it was but you can do this outside) and when the cup is melted, its like napalm, you can light it up and acetone can be found it nail polish remover