Large Blue Stainless Steel Vacuum Thermos 40 oz (1.2 liters)

The good: It holds a lot of water, the handle makes it easy to grip and pour, the spout delivers a nice flow of water from trickle to pour. The not so good: It doesn't keep water warm for very long. I used a thermometer and logged the temperature decrease over time, and of my 4 thermoses, this is the one that cools the fastest, by far. At its extreme (prepping the thermos with hot water to warm it up, heating water to 205, just below boiling) the water was too cold to drink mate (150F) just after 4 hours. And this was with the termos sealed tightly for the entire time. When you actually use it, the temperature drops even faster. Bottom line, it's a good thermos if you'll use it for a single sitting right away. It's not a good thermos if you want to prep water to drink mate later.