I used to carry a heavy glass bottle everywhere because I could not find a stainless steel water bottle that did not leave my water tasting of metal. That was until I was recommended Elephant Box stainless steel water bottles and I now own all three sizes. The quality of the 304 stainless steel genuinely makes a difference; the smooth interior prevents leaching and I have never once noticed a metallic taste. The wide mouth makes them easy to fill, clean, and fully dry between uses, and the removable silicone seal means no mould can build up around the lid. Each bottle comes with a 15-year guarantee and replaceable parts. Worth noting these are single wall so not designed to keep drinks hot or cold for long periods.