Radioactive Petri dish

I needed a Petri dish but thought I would make it cooler
Because its not a traditional Petri dish that made with clear plastic and to make this an easy cleanup, I recommend putting a piece of plastic wrap in it and taping it at the bottom to keep it as tight as you can, and then all you have to do is throw the plastic wrap away. and I would also tape the 2 pieces together when using it to keep it sealed.