Kitchen or anywhere DIY. Seems simple enough, depending on your gap between shelves, anywhere from ropes to ropes for your spacing. You could even use wider wood, just adjust your rope length to accommodate your width and height of your shelves.
Not my favorite photo- but the rope idea for shelves in the bathroom could give us 2 shelves and super cheap to make. MDF painted white with some holes and rope. in a color? 25 Small Bathroom Ideas You Can DIY