Things that are not regularly used or needed.
Nonstaples are usually not as important as staples.
Examples:
I found some nonstaples in the back of the drawer.
We only buy nonstaples when we need them.
Nonstaples like toys and games are fun to have.
She keeps all her nonstaples in a separate box.
We have so many nonstaples, we don't know where to put them all.
The store sells lots of nonstaples, like decorations and small gifts.