How I would go about this: if you are not interested in learning about dye lasers yourself, I would find a specialist working with dye lasers on Twitter and ask them to settle "an argument with a friend" that green tea does not work as gain medium. Then wait and hope that you have nerd-sniped them. With a bit of luck you can read a paper about the topic one day. ;)

Yeah, the title is "Simple Homemade T.E.A. Laser", not "Simple Homemade Tea Laser", and that seems like a weird change to make.