Sieve
thingiverse
Print a small sieve for what you need, sugar, rice, cinnamon ... or iron as in this occasion:http://www.thingiverse.com/thing:1458545 Print Settings Printer: hephestos 1 Rafts: No Supports: No Resolution: 0.2 mm Infill: 10
With this file you will be able to print Sieve 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 Sieve.