Less plastic, same great taste.
I printed mine in PLA with two perimeters and two solid layers with 30% infill. It is more that strong enough for a 1kg spool, I am sure it would have no problem with 5kg either.
Copied from the original:
Print two copies. Attach loosely to the top of your MendelMax. Insert 20mm M8 or 3/4" 5/16" screws with one 608zz through each hole and fasten with a nut. Adjust so the filament spool fits properly, then tighten the screws.