I. Need. Tea.
Also, if you are in a situation with dodgy water, boiling it is always a good thing. Having a kettle also means you can make instant oatmeal, ramen soup and other warm food when you’re in a pinch.
Don’t bother with the plastic travel kettles – they break, and heating up plastic over and over again isn’t good. Avoid buying travel kettles with separate bases or loose parts, as they aren’t as durable. A solid metal mini kettle like this one from Fust is all that’s needed.