“The Postal Service has created a special “kit” that contains the necessary mailing materials based on the most popular items ordered to send care packages to the troops. This kit may be ordered by calling 1-800-610-8734 and requesting CAREKIT04. The kit contains 4 Priority Mail boxes, 6 Priority Mail “Flat-Rate” boxes, 10 Priority Mail labels, one roll of Priority Mail tape, and 10 customs forms with envelopes. There is no charge for the kit. - source”

Of course you still have to pay the shipping though. Here are some Military Packaging Tips.

Stock up now so you’ll be ready to send my man some mail.

[via - Snopes]