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 recently bought a new espresso machine. At first I was all about using glass mugs to enjoy the visuals, but they didn't keep my drinks warm enough/long enough. Then I shopped for insulated ones, and bought a 14oz mug that did the job. But then I wanted something larger, for drinks like a London Fog or Dirty Chai latte. I've loved HydroFlask for years, so when I found this 24oz one (it's the only one I found that can be angled to fit under my brew head), I ordered it. It seemed on the heavy side when it arrived, but I told myself that I wasn't planning on going anywhere with it, that I'd only be using it at home. I just made a London Fog, The size was great. So far. my drink is hot. But that brings me to the "so sad" part. It's just too heavy. Yes, I can lift it, and drink from it, but I feel it in my wrist/hand and can't see myself using it with any regularity. Regretfully, it's going to have to be returned.

It is a very cute and handy size coffee tumbler and fits nicely to the grip. The added handle, making it highly portable and convenient. It also comes with excellent double-wall insulation and is equipped with a very clever (pending patent) flexsip lid for a leak-proof guarantee. I was impressed by the design at first sight overall and almost gave it a five-star rating until I took my first sip - the plastic taste from the lid/silicone seal induced by the hot brew just put me off completely. I washed it a few times following the instructions and waited at least 2 minutes before closing the lid as per the guideline; it remains the same. Perhaps with more washing and use, it could be better over time.