You could put food type designs like veggies and fruit, etc. Or you could go the monogram route and put your name in a cute font... Or maybe just little sayings like, SHOP, FRESH, or STUFF. Or anything that strikes your fancy, it only has to be something that you like.

You could also search the web for "green" sayings, like "save the earth-recycle".....stuff like that sort of goes with what you're doing....

HTH,

Cheri