Single-wall or double-wall titanium for camping?

Single-wall titanium (around 2.4 oz for a 450 ml cup) is lighter and can go directly over a stove or fire, but it transfers heat to your lips and hands. Double-wall titanium is heavier and generally not flame-safe, but reviewers in r/snowpeak and r/Ultralight consistently say it's far more comfortable to actually drink from and holds heat noticeably longer.