Black corrugated mailing boxes are very popular . This black pizza style box is manufactured on black corrugated which has a black core (inside). The example shown here has a rip strip outer but they can be manufactured without. The black mailing box shown doesn’t have a fitment but they can be produced with a custom fitment for you to hold your products securely in place.
These mailing outers can be supplied unbranded or printed with your own design.