Can we reuse bottles for the second baby?

Hi I’m expecting in late Sept early Oct our second, I know it’s a bit too early to start buying things, but I want to look out for sales. I am wondering if parents reuse bottle’s? I know nipples are a definite no no but what about the bottles? My first is now 17 months he has so much old bottles that we only use a few times since we switched to different brand bottles a lot; he has reflux issues. Honestly I’m not sure if I should just buy new bottles cause it is $10 more if I buy the bottles with a nipples vs just getting the nipples alone. I hate for the bottles to go to waste but I don’t want my newborn to get sick from bacteria that I can’t see or complete clean out. Any advice would be appreciated thanks.