To design for sustainability also means to KEEP DIFFERENT MATERIALS SEPARATED, making it easy for consumers to recycle your packaging.
You have to THINK LOGISTICS from the start. Secure that the size and format of your packaging fit your transportation pallets and avoid shipping a lot of air.
You should AVOID OVERPACKING, i.e. to minimize the amount of material around the product, such as fillings, triple boxes and super-complicated inserts. Tailormade packaging for your product can reduce the material but also reduce storage space and cost, while simplifying the packing process.
When you know how your company defines sustainable packaging, you can create a SUSTAINABLE PACKAGING STRATEGY that ensures that all new packaging follows certain criteria that guarantee your established level of sustainability.