help!! - examining room / mixture machine

[bgr]

OK, I got all the six chemicals, they're all gone to the machine and then what? When I put my palm to the machine it says "mixture not complete, failed to inject mixture"

There's a slot on the machine for "some kind of a container". What should I put there? So far I did all the riddles by myself, but now I'm stuck for good. Plz help!