Starch

(binder)

● natural polymer     ● abundant     ●affordable     ● renewable     ● widely used     ● biodegradable 

Vinegar / Citric acid

(cross-linker)

● easy-manufacturing     ● occurs naturally in citrus fruits     ● affordable     ● renewable     ● biodegradable 

Glycerin​

(plasticizer)

● obtained from plant and animal resources    ● non-toxic     ● affordable     ● renewable     ● biodegradable