coffeealex It’s a very good solution - but it does require some modest maintenance (and a plug nearby). If you are only going to use cold demineralised water for a coffee machine, don’t drink a lot of coffee/steam a lot of milk, and don’t need a “kettle-equivalent” hot-water maker, something like a ZeroWater jug can be more cost-effective and it has no maintenance, however it is more ‘wasteful’ of plastic, as you’ll need to change the filter more often than with the Osmio.