I could go with with this one that looks like a water bottle but the narrow opening would be a problem. I'd probably have to use a funnel to load my coffee.
I could go up to 24oz with this and get more of a thermos style but I had a hard time finding any images that showed the opening. I assume it's a normal thermos style but still I'd like to SEE it. Main issue here besides cost is that it's larger than what I think I need.
I also am not sure how long they keep things hot. They say double walled but the key I think is vacuum sealed. They also mention keeping hot up to 10 hours but I'm not sure.