About this 3D model

I based this deisgn on an aid that I found here - https://www.alimed.com/quad-quip-sandwich-holder.html. The one at the link above costs $20. The two printed parts cost $0.55 and $0.19, and the bolt and nut cost $0.68. All together that is $1.42, which is much cheaper than the commercial option. I couldn't find any rubber bands when I was taking the picture so I improvised with a hair tie. I used FreeCAD to design the two parts and Cura as my slicer.