I found the add I was talking about. If the plastic bottle has a 1 in the recycling triangle, it's one use only. If it has a 2 or 5, it's reusable. 5 is better. Mine has a 7 so I'm assuming that's better than even a 5.
Also, it said if you get any bottle that's dented or damaged, throw it away or return it. Or don't buy it. Cause damaged plastics, especially 1s, are more liable to leak chemicals back into the water even worse. Just some info from a magazine article.