1. We're on tank water in a drought, which means we can't afford the water to soak, wash and sterilise so many bottles.
2. Using harsh chemicals (chlorinated cleaner) meant we couldn't re-use the water on our organic garden.
3. The 10c refund came into play so people became reluctant to give up their bottles.
4. Having to buy bottles has been great for me and I'm gobsmacked as to why I didn't do this 10 years ago. I've got my life back! Fuck you stupid environment! I'm goin' to the beach.