My Cuisinart PerfectTemp water kettle.

I bought it 11 years ago, a couple years after moving out. It was more expensive than many of its competitors, but the build quality seemed worth the investment. Early in my career, it was a big investment.

I have used it nearly every single day in that time, and honestly never stopped to think about it until now. It's been a fixture of my life. Other than the occasional descaling, it's been perfect without maintenance.

Beyond that, as someone who drinks a lot of coffee - I'd also like to mention my classic Bunn coffee maker. It has a reservoir of water it keeps hot, the new water you add displaces the old water like a water heater, so you're able to make an entire pot of coffee in under 3 minutes.