what bottles?

My son is 1 month old and I mix feed him. Lately he has been having some trouble staying latched on which I attribute to him also being bottle fed. What are some good bottles that are not too expensive but have nipples made like the breast?

NUK they are still pricey but no where near as expensive as most other brands my son used them and had no problem latching

Is there any way that you could just use the boob for a week or so? Just so he can get more use to nursing again?

I used avent bottles while nursing. They are around $15 for 3.