BOX COLOBO SHALLOW L1GY

I used two of these boxes on one shelf in my Karabo. I think it's a great idea to attach a rail to make it into a drawer. However, I think it would be a waste to leave a gap underneath the bottom box, so I think it would be fine to use it without attaching the bottom rail. In my house, I put a N-in-box storage case horizontal half-size instead of this box underneath.