Partial Weening

Merm
I'm still nursing my son and pumping while at work, but I want to stop pumping. When he's at daycare, he gets one 6oz bottle of breastmilk a day and the rest is formula, plus purees for breakfast and lunch. Would I maintain some milk supply if I stopped pumping at work and nursed him in the morning and evening? 
Has anyone had success with this?