Milkmen and women in floats used to be a common sight around the UK, delivering their glass bottles to communities up and down the country. Then, in the 1990s, supermarkets switched to cheaper plastic bottles and drove many of them out of business. Recent news reports about a resurgence in demand for glass milk bottles delivered by “milkies” have suggested this apparent demand comes from customers who want to phase plastic out of their lives. Are they right?