cafepress shirt creating

[LiquidLove]

I wanted to make a Supply mom shirt and a Demand baby shirt with information about supply and demand on the back of each of them. I can see a lot of supply and demand shirts on cafepress, but none have info on the back.

Does anyone have any ideas about what I should put on them? How to increase supply/what supply and demand feeding is/growth spurt information?

Just looking for suggestions that would be concise and informative!

Thanks!