If we had to choose to bring one mug with us to a deserted island (or hell even just for everyday life) it’d be Ninja Prepper’s Mizu Insulated Titanium Mug. Firstly it’s made of titanium (a grade 9 alloy to be precise), double-walled at that to keep both your drink warmer and keep the outside cool to the touch. It’s super lightweight at about 3 ounces, holds a full cup of joe, and boasts collapsible handles even though you won’t really need them. And it doesn’t cost an absolute fortune like most titanium mugs.