1,200 refills. That is what my 2019 study assumed for a reusable bottle to beat a single use one. But this week I lost my stainless steal Owala bottle. Again.... A refill every day for about three years is a generous expectation of any consumer. I now question whether it was realistic, and my own track record is not helping. Life cycle assessment (LCA) treats technical parameters with great rigour, from supply chains to electricity grids. Human behaviour, which often determin