Originally Posted By: acropolis5
Alex, if you pop off the plastic screw top and retainer ring, can you use it to boil water? That's such a great price, that it almost has to have some hidden flaw e.g. Cap not water tight,....

Yep, I have some doubts as well, but on the other end. It looks like the bottom of the bottle is a separate piece welded/glued to the walls. That might render it useless as a boiling vessel, but maybe not. I will definitely check for that first on delivery (March 18th). The price is actually right. There are plenty of other SS bottles, but with a rather narrow neck, in the same ballpark off eBay. Nalgene is a typical trademark ripoff.