I'll preface by saying I'm not a plumber but I work with some and I've had to take apart one of our sinks recently.
Just because it fits in a disposal or a drain does not mean it goes there. It will clog your shit and cost you money.
Thus far I know specifically: eggs and egg shells, pineapple pieces, pieces or skins of potatoes, cooking grease, wet wipes or baby wipes and tampons.