I like titanium, light, strong and doesn't mess with flavors. I keep a Snow Peak titanium Trek 700 mug in my small GHB (nested with a Nalgene bottle) and a Snow Peak Trek 1400 Titanium Cookset in my truck's kit. Since my GHB is in the truck it's available too. For the simple process of boiling water there's an old all copper Revere Ware kettle in the truck, that brings water to a boil quickly.