Getting Baby to take bottle

My son is 4 months old and EBF. I had to return to work this week so he stays home with daddy. He is refusing to drink from a bottle and is only drinking like 4 oz for the 9 hours im gone. I'm worried he might dehydrate or loose weight.

We have tried 4 different bottles, positions, warm milk cold milk etc. Before I returned to work we practiced a little and he used the bottle fine but i wasn't gone the whole day.

Any tips or tricks to try getting him to drink more while I'm away? Didnt have this problem at all with my first who I breast fed for 16 months