Printed with rPLA with corn pgment:

https://www.prusa3d.com/cs/produkt/prusament-rpla-corn-pigment-1kg-nfc/

If you print it with those kind of rPLA, use bigger infill (because the inner walls will be visible). 

Otherwise 0,2 and 15% is OK.

Variations:

• one big container

• 4 small sub containers

• 3 subcontainers (1 big and 2 small)