put them in small pots at first until there almost route bound ( not fully obviously cause they will die slowly)
but if you Grow in small pot at first when you move to a new pot after the veg stage the roots will go mad with the new space available and shoot out quicker then normal repoting.
So yeah start small little pot like your cup thing ( make sure plastic cup is black or really dark so roots dont get the light from white cups.and leave plant in there as long as you can. Repot 1 week before 12/12 starts then your plant should bloom quicker and more efficient . just a tip