Could you have a stamp made (maybe the kind you get to stamp your return address would be cheap?) and then just get some fabric ink?<br><br>
Otherwise, cut out a little piece of fabric to sew inside, and use a fabric marker to draw your name/logo?<br><br>
Those would be the cheapest/easiest ideas I can think of, though I'm sure they sell custom-printed tags (and I think you can buy "Handmade by ______" fill-in tags from the craft store.<br><br>
I was thinking iron-ons. You could get one made (maybe from cafepress or vistaprint) and just iron them onto the bags kind of like kids' clothing have the flat, slightly-raised wording instead of tags. Just a thought!