Keeps hot, right size for one, nice product - a certifiable bargain you will love!
Positive Product Points
It does what a thermos should do - keeps things hot! It's also a very nice size at just under one liter (0,47 to be precise). The dispensing cap is a very slick piece of Japanese engineering.
Negative Product Points
At less than $30, it's really hard to criticize, but... the biggest issue IMO is the heat transfer from the stopper cap - it's the only part of the product that is physically warm to the touch from the contents. Also, I think the exterior of the bottle could benefit from a little ergo treatment to make ot easier to grasp - shape, rubberize, etc.
Who would have thought a thermos would merit a detailed review? But this one really dose stand head and shoulders above the rest.
The most obvious thing about this bottle is how long it keeps coffee warm. At times I'll have my evening coffee from the Americano I brewed into it that morning. If I don't open it during the day, the coffee requires no reheating 10-12 hours later.
There are other features to like, as well. For me, the size is perfect at 0,47 liter, or about three modest size cups. I pull two doubles into the bottle and add about 300 ml water, and that keeps me going all day. In addition, the stopper is really something! A very slick piece of engineering whereby you push a button of top to open the dispenser, and push a slide to close. I expected it to leak at least a little, but amazingly it doesn't.
On the "next generation wishlist", my top want would be some ergo treatment to make it easier to handle (don't get me wrong, it's not difficult now). I think changing the bottle shape to add finger indentations, and/or adding some texturizing or rubberizing would be an improvement. Also, I do notice that coffees from the thermos acquire some unnatural (though not unpleasant) high notes, but I suspect this issue results simply from "keeping warm", and would happen with any good thermos (I wouldn't know since my old Stanley only kept things luke warm for a few hours).
At less than $30, I think this bottle is a real deal.
I purchased in Narita Duty Free simply to use some Yen at the end of a trip. I paid about $22 USD.