Maker Screw
thingiverse
This is a good alternative to the maker coin, it just use 4.5 m of filament and it's stackable.
Download Model from thingiverse
With this file you will be able to print Maker Screw with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Maker Screw.