Well, this might be obvious for everyone that has been into 3D printing for a long time, but I completely fell for it.
For a current project that’ll take a couple kilograms of material in chunks of like 500 to 700g, and the recent singles day/11.11. sales frenzy, I bought (among other spools) 3x 1kg of Geeetech PETG white. I previously bought a single roll of that exact “700-001-1310” stuff, so I figured I could just print one of the parts for as long as the filament lasts, and then simply switch over to the new spool.

Of course I was mistaken. […]