Most cafeterias sell water to their thirsty customers in plastic bottles full of mineral water. The water is no better than the tap water in most countries, its environmental impact is dubious, and of course it turns a tidy profit for the business. As a customer I find it annoying to pay for one of the most common molecules on my planet, but hey, there are bigger problems and like all of you I pull out my wallet and forget about it.
So you can understand my delight when, while visiting the Science Museum in London, I saw this in their cafeteria:
Self-serve, free and simple… what a delightful practice!
And then there is the wonderful museum itself…