That Vargo bottle seems nice. Exotac also makes another titanium bottle that is about the same price (650 ml IIRC).

Since TeacherRO mentions getting a metal water bottle for heating/purifying water, I was wondering, do stainless or titanium bottle require noticeably more fuel to boil water in compared to aluminum since they don't conduct heat as well? Practically speaking, that is.

I'm sure the ultralight crowd has figured this one out already, but I don't really read those forums. Thanks.