So, a few days ago my son finally drank 3 4oz bottles of formula it was the Avent natural bottle's…

So, a few days ago my son finally drank 3 4oz bottles of formula it was the Avent natural bottle's he's had when he was 3 months and younger.

Ever since that night of drinking bottles, he won't drink anymore. He tries to turn his head away once he tastes the formula (EarthsBest) or he fusses and refuses to drink.

Now he'll only take his Nuby silicon sippy learner cup (the grip and slip) with baby water unless he's hungry.

He's still being breastfed and I was able to store up 2 bags of milk the night he drank the bottles.

I really would prefer to breastfed at night (for convince) and pump to release some pressure during the day while weening.

Any tips, advice or suggestions?