Must contain liquid.
Easy to store and to transport without breakage or leakage.
Completely stable - does not interact with the product.
Allows shelf stability for 15 months.
Convenient to open, to use and to store
100% recyclable in local government-run recycling systems.
Crucially our requirement was minimal end-to-end carbon footprint.
The significant increase in weight of glass over plastic increases the energy consumed (and therefore CO2 footprint) in transportation.
The significant increase in breakages with glass (from the supplier, as well as to the customer) is far less efficient than plastic due to the increase in returns and the associated packaging, and transportation required.
Plastic sachets are not easily recyclable. They require very specific recycling methods which are not available in government run, domestic recycling systems.
A plastic sachet requires the use of significantly more plastic per serving, than a bottle.
The plastic that we use is fully recyclable: bottle, cap, and label can be recycled as easily and in the same way as milk/juice bottles.
We are working with our manufacturer to transition to using recycled plastic and they have committed to doing so, but we do not have a firm ETA.
Beyond that, we are keeping a close eye on ever-changing manufacturing and bottling processes, with a view to moving away from plastic entirely. We do not have a timeframe for this at this point but we will keep you updated.