Cool Ginger Shandy bottle

I found this at a local consignment shop for ~$15 bucks. Its about 10 inches tall, is a clay crock type material and is in pretty good shape. There is a chip at the top near the stopper and it has some aging as far as dirt and grime but overall is pretty nice. Haven't had a chance to research it much yet but at $15 bucks I couldn't pass it up. I'm assuming it's old and not a reproduction as it has an aged, grimy look to it but I don't know for sure