The Whole Foods Market produce display in Lincoln park is just asking you to eat your fruits, and veggies! Their signage (above) and within fruit displays highlights key fruit attributes so customers don't require a produce expert as they look around.
Writing coffee with the "coffee cup stains" is nice. The original stain that makes the "C" was probably enlarged to create the "f", overlaid to create the "e". The nice brown color that remind us of real coffee stain.