I never have, but others have. And you can if you want to. I want to say I have read about hopping in the bottle, and adding juice. I think a chili too. Since it is your first batch, I'd at least leave some bottles alone, and use restraint. Don't go overboard, consider the small amounts of additions you may be using. Look up what someone might use in a 5 gallon batch and do some math to figure out what to put in the bottle. Look up 'bottle additions' or some variant.