Vargo Titanium EDC Water Bottle

It's very thin titanium and will dent pretty easy, any thin metal cylinder not under pressure will dent pretty easy even tungsten.

Some people like to have their water container be able to go over a flame. I do a lot of cold weather camping so I hate heating up cup after cup of water to get the amount I need for various things (not everyone only heats up enough water for a freeze dried meal). Right now I have a stainless Nalgene and it weighs almost 14 ounces. This only weighs 8 (probably less if you replace the lid with a standard Nalgene plastic lid). My toaks 750ml cup nests perfectly under bottles of this form factor so it seems like a good option for my needs. YMMV.