Designed and manufactured in Britain, Greenbottle is a biodegradable milk bottle that uses a smart two-part system to aid recycling. The bottles are composed of a cardboard outer manufactured from pulped, recycled cardboard, which is lined with an inner sleeve of biodegradable plastic made from corn starch. The plastic keeps the cardboard from becoming soggy, and the cardboard makes for easy transport, storage and pouring. Once the bottle is empty, the inner sleeve can be pulled out and will decompose in a landfill within six weeks. The cardboard outer can be put out for recycling with other paper or thrown in with kitchen and garden waste for home composting.