I would get two of each - hideys, bowls and bottles. Especially during the dominance phase when the hierarchy is being established during the first days/weeks, part of the dominance behaviour is to chuck the underpiggy out in order to establish first choice; that goes for both genders. Ideally, you place each same item at least a body length away from the other one to enable unhindered access.
In the case of pellets, rather give smaller portions twice daily than leaving one topped up big bowl out. Apart from the dominance, young piggies can be scatty and pee and poo in the bowl and mess it up.