Well, not sure how much is too much to spend... at this site,
http://www.eggcartons.com/product-exec/product_id/663/nm/Twin_6_Egg_Mis_Printed_Cartons_EGP6MP
you can get mis-printed cartons for less than $0.50 each, but I couuld see how that might be rather wastefull too. You can make labels to stick over re-cycled supermarket cartons, not sure how expensive that would turn out, but you can use the free software from the Avery site I listed below.
I made a template for labels using a picture Tiramisu posted a while ago. (such a perfect Pic!) It can be printed on Avery Label # 8768. best way to get it to print is by using the free Avery DesignPro program from the Avery web site.
There are other ways to get it to print, but the free software is extremely simple to use. Here is the link if anyone wants it.
Avery Download Seriously the free-ware makes it easiest to paste pics and get more than one to print out properly.
I've done it in the past using PowerPoint, and Word Tables and all sorts of things, but it is often quite annoying doing that (and I used to have to make all kinds of presentations for bosses (yes plural, many bosses at one time, AAKK! so I got good at manipulating pics and such for presentations).
I just made funny little saying for this one, but a gift tag, farm name, address, phone number or whatever else anyone wants can easily be added.
Here's a pic of what the one I made looks like. Anyone with that Avery program can make their own very like it using that free software and Avery labels, or, skip buying the labels, use just plain cardstock and spray adhesive if you're crafty enough!!