Is it legal to advertise a small business on homemade wine bottle labels? The wine would be given away as gifts and absolutely not offered for sale or exchange. I have tried searching this topic here and google and can not find any information on the subject. My wife is a real estate agent and would like to give some of our wine to her clients as a closing gift. I would like to advertise her real estate services on the label but want to make sure that it is legal before I do so.