http://www.usfirst.org/roboticsprograms/ekocycle-cube-3d-printer-program Did an analysis on this... They say in the fine print 25% recycled content and that includes 3 20 oz bottles (17-23g each if you use a PET bottle and their "plantBottle" for reference). This would indicate that there is likely about 200-250g per spool at a cost of $50 per spool (shipping may be extra). This is an compares unfavorable to spools we can easily get off of Amazon ($40 for 1 kg). It's also a Cube so it likely won't be very useful in trying new filaments out since there won't be anything but this EKOcycle filament. @Terence Tam, keep with your open source roots!