FP Compostable Bin Liner 60L - White, 650mm x 900mm x 30mu (450) Per BoxCompostable bin liners are made from organic plant materials. They break down swiftly in a home or commercial compost environment in about the same time as a dry leaf. They offer the most practical and environmentally friendly solution. Making bags from corn instead of petroleum by products is a major advance in environmental technology. Corn is an annually renewable resource, which unlike trees, is grown and harvested in a single season.