Storage is at a premium at our house, so Betty wanted to get the spices out of the cabinet, hence a spice rack was in order.   I made it from 5mm plywood, no frame just glue all the corners.   This is before I though of using glued mitered corners for projects.   The rack came out plenty strong so 5mm is a good choice.    I made two of them one for each side of the sink.  

Later I came back and added pegs for hot pads.  

Right side.

Right lower corner.

Left side.

Pic of right side with hot pad pegs

Closer look at hot pad pegs.

Hot pad peg without hot pad.

Back of spice rack, not the keyhole slots for hanging flush to wall.

Close up of keyhole slot.