Commissary; Generally speaking, small supermarkets and grocery stores will have a lot of cartons left when they purchase goods. You can ask the boss to keep a few and spend a little money on them.
2。 Wholesale market; There are many cartons in the general wholesale market, or you can meet a place that specializes in selling cartons, so you can wholesale a little.
3. Network. If you need to customize some cartons with special sizes, you can find the corresponding merchants online to make customized purchases.