Dang Tony, I like it!
I'd put something on there for the people who have to to contact you if they so desire. Even a small white stick-on label on the back side with a phone number, e-mail addy or something like that. That's what the amish do that I buy from. They take orders a year in advance, and fill those orders first before selling any. That way they know how much they have to make at a minimum. You just can't show up at their house to buy some. Only after they get all their customers taken care of will they put out a "Maple syrup for sale" sign.