When first receiving the travel flask/cup I was impressed with the stylish design, the size being perfect for taking hot drinks out on the go - as many can be SO big. Bigger than needed for a simple cup of coffee. So I was really happy with the size. It is also lightweight and with the handle, easy to hold and travel with on the go with a leak-proof design which is really effective. When it comes to retaining heat, this is a highly effective and high quality flask. I poured myself a cup of coffee which I forgot about and after 45 minutes took a sip from the flask, half expecting it to have cooled down at least a little. However, I found the coffee was almost still freshly poured which was a bit of a shock to my tongue from the still freshly poured scorch of heat. The ability to keep heat to that degree is a high benefit of a travel flask however and I was really impressed. The only negative is, it took a few thorough washes to eradicate the taste of rubber/plastic when drinking.

I absolutely love this flask! It has a fantastic design with a sturdy handle that makes it easy to carry around. The exterior stays comfortable to the touch, regardless of whether the contents are hot or cold. While it claims to keep your tea perfectly hot for 12 hours, I’ve found that it excels in other ways. It keeps my tea piping hot for at least 3-4 hours with the lid closed and gradually cools over the next 3-4 hours. In total, it provides warmth for around 6-8 hours, with some residual heat lasting into the later hours.
The lid has a unique design that might take a moment to figure out, but it’s clear that this thoughtful feature plays a big role in retaining heat. Overall, an amazing flask!
The lid may take you a minute to figure and the design is very unique but you can tell the design of the lid is really what helps keep the heat.

I am a big hydro flask fan and prefer it over any of the other flask/bottle brands…but this was a major flop in my book:

1. The lid is too complicated. This bottle has a weird 3 step de-assembly that you HAVE to get used to if you plan on cleaning your bottle after every use. If you choose not to de assemble it, you’ll be left with a nasty coffee residue. Getting this step is highly important or else you drink will end up everywhere (I learned the hard way)

2. It doesn’t keep hot drinks hot. I’ve only used it for coffee so I’m not sure about cold drinks. I commute, so it’s important for my drinks to stay HOT hours after I leave my house. My commute is about 1.5hrs and by the time I get to my destination, my drink is lukewarm.

I never write reviews but this was a major disappointment (or maybe I had my hopes up too high?) and not worth the price. I am returning and finding another bottle. I suggest you save yourself the trouble and find another bottle!

The Hydro Flask 16 oz Coffee with Flex Lid is the perfect size—it keeps my coffee hot for hours, fits easily in my hand and bag, and the Flex Lid is super convenient and secure. The quality is consistent with what you’d expect from Hydro Flask: durable, sleek, and functional.

However, I have to knock off one star for the confusing rewards system. It’s not easy to figure out how many points you have or how to actually apply them to your next purchase. For a brand with such a loyal customer base, I expected a smoother experience.

Speaking of loyalty—I’ve purchased close to 20 flasks, and I feel like I’ve earned a free one by now! It would be great if the company recognized and rewarded long-term customers a bit more clearly and generously.

Still, if you're looking for a reliable everyday coffee flask, this one's hard to beat.