nalgene water bottles are truly amazing!  I know that they have a warning that if your bottle has a number 7 on it, it could be toxic.  However, don't listen to them!  The only way the toxins can come out of the plastics is if you put it in the dish washer a lot.  So, you have nothing to fear.  Anyway, the thing never breaks or cracks, not matter how hard it falls.  So, if you are serious outdoors person, this bottle will be the perfect fit for you! Also, don't use any liquids but water in your bottle.  Other liquids get into the plastic's pores, which is gross.