What is the name, kind, brand of ink or paint that is used in the printing of plastic cups?

I would like to print logo or designs in a plastic cup using the silk screen method. What is the name, brand, supplier of the ink or paint that is usually used in the printing plastic cups. Where can i find them?What is the name, kind, brand of ink or paint that is used in the printing of plastic cups?
I really don't know how to help you, but I can tell you this; inks for printing on materials like that have to be EPA safe, and are made specifically not to be poisonous if it is accidentally ingested, even in tiny amounts, so it would have to be organic based. These kinds of inks dry on a surface in a couple of seconds, when exposed to a strong UV light source. Try doing a web search on commercial printing inks, ink for silk screening, or a few similar listings. You should be able to find a printing company you can contact and ask who their ink supplier is. Good luck!