Funny you should say that… I bought a bottle of water on the way up to my dads (usually try to avoid doing that but was stuck on a very hot train for several hours longer than intended). I’ve been filling it with tap water to take on walks, today I noticed it was tasting quite ‘plastic-y’ which I found quite disturbing so chucked it in the recycling. Your comment has reminded me to invest in a metal-lined reusable bottle, cheers.