I tested the cheapest filaments that I could find to answer the question if cheap 3D filament is bad.

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Products used in this Video:

Elegoo PLA:
https://www.elegoo.com/collections/el...

Creality PLA:
https://www.creality3dofficial.com/co...

Polymaker Polyterra PLA (Affiliate Link):
https://amzn.to/42GWI9r

Geeetech PLA (Affiliate Link):
https://amzn.to/3Zguyz7

SunLu PLA + (Affiliate Link):
https://amzn.to/3TKZtlW