Experienced mothers!

KLS • Married to the man of my dreams & learning to be a new mommy with our beautiful little girl!
Okay ladies, I have a question for you. I am wanting to breastfeed, but if all else fails I will be using Honest Co's new organic formula. It comes with 4 tubs but I don't have any idea how much that is?! So my question is, how many tubs do you go through a month with a newborn?? The tubs are the same size as the similac & enfamil tubs. I just want to have a heads up in case I need to order some.. Thanks!