My idea is generally came from the coca cola line.
this design is showing a pair crate and 8 bottle crate
this crate material is plastics that made from bioplastics PHA (Poly Hydroxy Alkanoat),
Plastic commonly derived from petrochemical can now be produced from green materials that are eco-friendly.
The raw material came from the hydrolysis of crude-palm oil that is fermented to produce bio-plastic PHA (Polyhydroxyalkanoate).
Not only it comes from renewable materials, polyester produced from
microbial as a base material for plastic is also environmentally friendly (biodegradable).
taken from : http://www.bic.web.id/in/lain-lain/202-plastik-ramah-lingkungan.html