I drink hot beverages throughout the day and this thermo tumbler does an excellent job at keeping the temperature. In terms of application, when drinking, no leaks.
When traveling, great little size to fit in regular cup-holders and bags. The lid seals tight, so again no leaks.
For the intended use, it's perfect. I have a Keurig coffee maker, and I usually make an 8 oz cup of coffee which this thing holds with room for milk.
I like the bamboo feel and it's easy on the eyes too, like a little piece of furniture. LOL

Favorite feature after a few days of use? the hot temperature of the drink after even a few hours.
At the end of the work day yesterday I topped it off with hot water, went out to dinner and movie and then pulled it out of my laptop bag and took a sip of the tea.
Yep, the drink was still hot. A pleasant surprise and a real treat!

The best I've had

Super cute! It does keep my lemonade cold and my coffee/tea hot for at least 8 hours by my estimation.
I also like the tea basket it comes with. I'm glad the read the instruction because this cutie is hand wash only.

It was just fun to open. It is beautifully designed and the bamboo feels so smooth.
I will have to add a picture later but it lines up perfectly with my dbrand Ipad skin.

Classy & elegant looking tumbler.

"Love this product. It’s lightweight for carrying around in my bag… And it’s truly all-purpose; it keeps my water cold and my tea hot. I’ve already gotten lots of compliments about its bamboo finish from my friends and even strangers. I can tell that I’ll be using this tumbler for a long time."

Totally perfect for my use!
Great looking, sturdy and a very well made product!
Received many compliments from friends and family.

Perfect for me!

I just received my bamboo tumbler. I really enjoy the look the feel of holding it.
I love herbal teas and fresh ginger tea. Now don't have the issue of the teas floating through, great buy!

Looks great and does a good job at keeping my coffee hot! Great customer service. Great quality!

I bought this after my ceramic travel mug broke after 2 weeks of use. This is the best tumbler ever! Keeps my tea piping hot & iced cold for hours.
No leaks! The strainer is very handy for my loose leaf tea.

Best Tumbler Ever

I really like this. I had a similar one previously with a glass interior and plastic exterior, but this one keeps a drink hot much longer.
Also, it can't shatter. I'm very happy with it.

Sturdy, works well

This is a really nice tumbler. I filled it with ice water and took it to the beach. Not only did it keep the water ice-cold but the cubes survived a refill and then some.
I really love the look of the bamboo and the fact that this tumbler does not sweat, even in humid conditions.
This product just feels good in your hand and looks great, too.

The shipping was fast, right on time. I recommend this item.

Very nice product.

Some of the thermoses I’ve seen have plastic on its inner lid.
NiftyCORE’s, on the other hand, is STAINLESS STEEL.
This thermos looks elegant with the smooth bamboo casing.
I love that I can use this for either tea or coffee and that this keeps my drink hot for several hours on end.

Superb Plastic-Free Thermos

Love my Tumblr 💜
I had a cold and some loose tea leaves and needed something quickly.
This not only is great for loose tea but infused fruit and all!
It also is a major bonus that it looks very sleek and fancy😊

This is such a great looking product, and it keeps my tea hot for a very long time.

I love it.

This tumbler was a gift for my sister, who recently discovered Teavana! She is excited by the prospect of starting her workday with a positive, healthy start. Might order one for me!

Super gift idea

The Nifty Core tumbler is a great product, it does what it says, makers should be proud of this product, I know, I enjoy it.
= thanks for a very good purchase.
Cheers, Victor Felismina -Portugal

Pros: compact size, very well insulated, leak proofing good, versatile for tea with infuser, good for any hot or cold drink Cons: none that are evident, so far

Hello, I received this product for a Christmas gift. I work from home and have used the tumbler multiple times a day since.
I absolutely love this product. The mesh strainer works flawlessly for my tea and morning coffee.
The strainer is fine enough that I have actually brewed course ground whole bean coffee in it before.
I have unfortunately dropped the tumbler on a few occasions, and I am happy to say there is no damage, unlike my beloved teavana tumbler that shattered.
The tumbler will keep tea hot for hours. There is no sign of lid warping and is still spill proof after three months of continuous use.

This imo is the best Tumbler on Amazon.

Keep tea hot for hours and extremely durable.

I love it. Perfect size for my purse, so convenient to carry around.

I’ve been using this tumbler for a week now and this by far, the best one I ever had. Water is my favorite beverage and I love it when it’s cold. This product doing its job!
The water stays cold for at least 8 hours! Wow! Not only that, beautifully made of bamboo that prevents slipping off my hand.
Grab yours now and you’ll never regret it!

Beautifully and Quality made Tumbler!!!

This is clearly a quality product well worth the price. The tumbler was well packed and shipping was very fast.
I am very happy with this purchase!

Quality!

This is such a beautiful and functional tumbler. I love how it looks and feel. Looking forward to trying it with my loose leaf tea I got for Christmas!

"Very pleased with the quality of this product. Oftentimes when purchasing online, the item looks a lot better in pictures than it really is. That is not the case with this tumbler. Finish and detail is excellent. The best part of this tumbler is the ability to choose the strength of your tea or coffee. For a stronger brew, place leaves or grounds in bottom, for a milder strength, place in top. I can bring this tumbler to work and just add hot water to my grounds when I want a fresh cup. Love this little tumbler."