Cast iron is pretty awesome, and they're plenty "non stick" if you use plenty of butter. The argument for coated pans kinda goes out the window if you're not trying to cut out fat, other than that cast iron is heavy.

I also love keeping glass jars. I use them to drink out of, containing food, distilling, etc. They're way tougher than actual drinking glasses too. Eventually I might toss some in recycling if I've got too many, but I don't buy all that much canned food in the first place so it kinda works out.

In terms of water, I still need to get an RO filter, but in the meantime I've been using a regular water filter and also distilling my own water. Don't believe the hype around distilled water being bad for you, because it's not. RO water is pretty close to distilled anyway, but nobody handwaves about it eating your bones or other such nonsense.