I really wanted to love this, but I'm extremely disappointed with this coffee tumbler. I wanted something sleek and leakproof to slip in my cupholder on my way to work. Everything about the bottle fits that bill, but the huge problem is that it fails to keep my coffee hot for longer than an hour and a half. I'm shocked because my regular Stanley water tumbler keeps my water cold for basically a whole day, but this coffee tumbler... It doesn't compare AT ALL.