I’d recommend Thermoflask. I’ve had a pair of these for I dunno 7-10 years possibly, and from a quick search it looks like they may be sold in the UK. https://mythermoflask.com/products/thermoflask-insulated-stainless-steel-4-lid-combo-pack-40oz-1-1l-2-pack I believe they fit all your criteria and are “wide mouth” universal lids (have put some on from Klein Kanteen and others)

I know it’s semantics but those sound like nimby liberals and not progressives. Also yeah interesting argument on this part. I think easy climate action always starts in our homes and backyards!

“Resigned”

If you move to the desert there’s no organic matter in the soil. Problem solved. ;) anyway, sounds like you have a good problem to have!