Honestly, there should just be a tax on disposable packaging. Watch how quickly reusable packaging and refill setups become "cost-competitive".
@joepie91 I think it would be so ridiculously easy for most companies to slash 50-80% of their plastic packaging use. Just put a thinner packaging in a cardboard box, geez.. And there are so many other options if that doesn't work well.
But it would definitely require government intervention.