Favorite Uninsulated Travel Mug?

I drink my coffee during my morning commute, usually 45-60 mins long. Nearly every travel mug I have is insulated so well that its still scalding hot an hour after I arrive, so I have been using a plastic travel mug instead. This work, it cools to a drinkable temperature after about 10 minutes, but I can taste the plastic. Something is leeching into my coffee and it gets astringent during the last half. Awful. I need something new. Most mugs advertise they keep it hot for 6 hours! I dont want to wait 6 hours to drink my damn coffee!! /rant

Anyone else have this problem and good suggestions? I'm all ears. Thanks!