Can you use your own box for USPS priority mail?
I'm wondering if it's possible to use my own packaging box for sending items via USPS priority mail, instead of using the ones provided by USPS.
Is it cheaper to send a 20 lb box UPS or USPS?
Excuse me, I'm trying to compare the costs of shipping a 20-pound box using UPS and USPS. Could you help me understand which service would be more cost-effective? I'm curious about the pricing differences, especially if there are any discounts or promotions available with either of these carriers. Additionally, are there any other factors I should consider when making my decision, such as shipping speed or reliability? Your insights would be greatly appreciated.