Standardising glass containers for the EU has been talked about, and has even happened to some extent: bottled water in Germany, for example. Apart from spirits

Standardising glass containers for the EU has been talked about, and has even happened to some extent: bottled water in Germany, for example. Apart from spirits (Baileys, Cointreau, ...) and some beers, not that many brands use a seriously distinctive glass container in the UK, though there are notable exceptions, like Marmite and its imitators. I don't think many brands would want to be seen as opposed to protecting the environment. Plastic containers are recycled in the UK, rather than reused. Shampoo would presumably not be affected. A glass container for shampoo would be problematic as thousands of people get shampoo in their eyes in the shower, drop the bottle, stand on the broken glass, slip on the blood, and so on. Now, if they could require different types of bottle for shampoo, conditioner and bubble bath that might prevent certain incompetent persons from constantly picking up the wrong one in the shop.