I love the picture and as I had just finished making 40 lb of marmalade it felt very apt! It often feels like I am collecting all the jam-jars in the world (I certainly have a garage-full and frequently find bags of them left in my front porch!)
On poking around the site, it turns out that the artist is another Etsian : http://inkfingersutter.etsy.com/ .
He does screen-printed T-shirts, so maybe I will commision a T-shirt of the picture to wear at my Markets
Super-hero Marmalady (and many other super-heroes) can be found here: