This coffee thermos is easy to get! When you're exploring Bird Leg Cabin, head over to the kitchen. You should see it in corner, on the counter.
The screenshot is taken from the PC version of the game. I had played the first ten minutes or so a few months ago, and collected this specific thermos, but I've marked where it used to be.
If you need any further help collecting this item, feel free to send me an email and I'll try to help!
