As our price of plastic box pack is not competive, so it nearly cancelled and was instead by paper box pack now. It's naked chocolate sealed by an aluminum foil bag, then put into a color box.
Besides, there's sealing problom for plastic box, the shelf life is more shorter than paper box pack. Because the aluminum foil bag will play a role of keep chocolate out of sunlight & heart protection. Mostly time the shelf life is 15 months.