Take some polythene and add up to 70% of chalk and you have a compostable material which can be extruded into film or blown into bottles.
Some of the luminaries from Tetra Pak are now the driving force behind Swedish company Ecolean and, of course, the target is dairy products. Milk pouches are a major product for Ecolean in many countries but their pouches are also used for wine (picture). The film version has good dead-fold and is being used for butter wrap by UK’s Marks & Spencer.
Rumour has it that a West Aust. dairy will soon pack milk in the pouches.