Sorry mellow, I don't think that will work very well for ya. dead roots left in the pot will rot. I would personally use half of a dixie cup for each maybe(not sure your exact constraints). Then you can toss some later. Think about the trouble you'd have untangling roots. Better to have them rootbound than rootrotted.
2"-3" pots would be perfect for now. I've used 6" pots till the end(now I use 8" due to actual size discrepancies.)
But I do start them in 2" water bottle bottoms, transplant to 4" then 8".