The USPS will send you free packing supplies in a Military Care Package kit. Call 1-800-610-8734. Choose the option for priority mail service. When you reach a live agent, ask them for the Military Care Kit. They will send you a kit that contains 6 boxes, tape, labels, envelopes and customs forms. The kit takes 7 to 10 days to get to you. The lady I spoke to just sent me 2. The first time you call, they will give you a code to save and use each time you call so they don't have to ask your info every time. I've done this for every deployment so far. It saves me a ton of time to have it all done up before I go to the Post Office. You can even pay your postage online, for flat rate boxes, and have your carrier pick them up.