Transplanting Tomato into Larger Cups

I noticed my tomato plants getting a little yellow in the leaves and had read this is commonly a nutrient issue.

I decided to transplant into larger cups to give the roots more soil to dig into.

These tomato plants are 6 weeks old and could go outside BUT our weather has been a little too chilly, so the goal is to keep them inside another 2 to 3 weeks.