A little leaky, but great!
This was my first experience with a vacuum bottle, so didn't really know what to expect. For what this item is, it's great, but i think i was looking a little more for something like the Primus Commuter Mug. Vacuum feature works great, and everything is kept cold, warm, or hot! would suggest heating the bottle up (or cooling down) before filling though, this really helps keep the contents at the desired temp. 3/5 only because it's not exactly what i was going for, 5/5 for doing it's intended job perfectly. Only negative is that liquid can sometimes build up in the vacuum top after use, and leak out - this can be solved with a little shake and drain before putting back in your pack.