Klean Kanteen is the way to go for your health and for the Earth. It does a great job keeping things cool (up to 58 hours). I don't worry about plastic leaching out, it doesn't leak, and talk about sturdy. This bottle can last forever...but if somehow it got crushed (I'm not sure how but life does happen) the metal is recyclable. I own backups so if I leave one somewhere I'm not without.