If you want something for hot liquids, why not a glass lined Thermos bottle?

For cool/room temperature water, I feel reasonably safe with my Camelbak Better Bottle (copolyester). As safe as with stainless, which can leach chromium. Anyway, I love the Camelbak tops, with the leak-proof, upright, folding valves and the little finger hook you can use to carry them with, hang them from the hook in airport restrooms, etc.