These bottles are tough for being plastic. does great for holding cold water. Warm water it will still be fine. I personally would not put hot or boiling water in it, even though it is rated for higher temperatures. Check out this link for exact numbers and stats.
http://www.ptonline.com/articles/dishwasher-safe-new-clear-copolyester-is-tougher-more-heat-resistant-and-processes-easier-too