@geert_2, most cardboard boxes I see are made from 100% recycled fiber, so your response is quite silly. UM can easily use recycled cardboard for the spools, or at least make the spools a lot lighter, to use less plastic. Plastic is a wonderful and very useful material (I obviously use lots of plastic to make 3D printed parts), but I don't understand why we need to be chucking such huge amounts of it into the trash. The UM plastic spools and associated packaging are a huge waste.
I already made the switch to a different brand of PLA filament (made in the USA) that comes packaged in a much less wasteful way and prints just as well as the UM Tough PLA (maybe even better), with the added bonus that it's 25% less expensive. I built a simple system to use 3kg spools from this other brand, which reduces waste even more, and drastically reduces the frequency with which my printers run out of filament. Win-win!