Never thought a thermos could get any better? Then you thought wrong. While you may not have known this, smart thermos flasks come with smartphone connectivity and LED screens. These features all come together for one thing: customizability and user-satisfaction.
But of course, these thermos flasks must cost a fortune, right?
Well, not really. Most can be bought under 50. And they never go beyond 100 bucks. So you see, even the best value thermos flasks can be extremely cheap and valuable.
So to start you off, I’m reviewing the best thermos flasks. These include features like thermostat temperature control, Bluetooth connectivity, and much more.
So let’s dive in!
Products reviewed in this article (in the appearance of our rating):
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Mirabile Dictu Intelligent Temperature Display Vacuum Insulated Water Bottle,Leak Proof, Stainless... | $16.99 | Check on Amazon |
| Preview | Product | Rating | Price | |
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Cauldryn Coffee Temperature Control Travel Coffee Mug and Desktop Warmer, Long Lasting Battery... | Check on Amazon |
| Preview | Product | Rating | Price | |
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Ember Stainless Steel Temperature Control Travel Mug 2, 12 Oz, App-Controlled Heated Coffee Mug with... |
$165.58 |
Check on Amazon |
Table of Contents
DAWAY Vacuum Thermos – Our Pick
If there’s something that always looks good on an electric thermos, it’s eco-friendliness. And the DAWAY Vacuum Thermos has just that to offer. This elegantly designed flask is not only user-friendly but user-safe, and has all the functionality of a digital thermos. It features a smart thermometer, a timer and alarm function, and even a stylish carry pouch.
Key Features
- Ergonomic design in various colors
- Non-toxic stainless steel construction
- Smart thermometer
- Timer and alarm feature
- Trendy carrying pouch available
| Specifications | In the box |
| Capacity: 17 oz/500 ml Bottle size: 9.29*2.72 inch/ 236*69mm |
DAWAY G3 Water Bottle Original Package Box Portable Holder Bag Quick Guide Magnetic charging Cable |
Eco-friendly Construction
The DAWAY G3 Thermos is made from fine quality 18/8 stainless steel. This steel is FDA approved and has been known for its eco-friendly uses.
Firstly, it doesn’t rust or corrode, nor does it release any toxic gasses. Being heavily insulated, the exterior will never be too hot to touch, keeping you safe from scalding your hands.
Smart Thermometer
What if you could actually see how hot or cold your beverage is? With the DAWAY G3, you can. The top LED panel displays the current temperature of the contents. So you don’t accidentally drink boiling hot coffee.
Laggy Touch Response
The LED touch screen of the thermos, unfortunately, has some known issues. The touch repose may not work or may require more than one tap. This can be frustrating if you want to turn off an alarm or check the temperature.
Mirabile Vacuum Thermos – Runner-up
Saving that coffee for later? With the Mirabile Dictu Water Bottle, you get to share your coffee for 24 hours. This thermos has an inner capacity of 17 ounces and can hold cold beverages for 12 hours and hot ones for a day.
Key Features
- High tech thermometer
- Test internal temperature easily
- 100% safe to use
- It maintains temperature for a whole day
- Easy to wash and store
| Specifications | In the box |
| Capacity: 17 oz/500 ml Bottle size: 9.25*2.76 inch/ 235*70mm |
Mirabile Dictu Water Bottle 1 Lithium Metal battery Quick Guide |
Test Temperature of Contents
Here you can test the temperature of the contents immediately. Simply turn the bottle over to let the contents flow onto the back of the lid. The LED screen will automatically display the current temperature.
Safe to Use
This thermos is made from BPA-free 304-stainless steel. So you get the best experience while your body stays free from toxins. The exterior is insulated so you don’t burn your hand while handling hot beverages.
No Fahrenheit Measurements
Unfortunately, you cannot convert the Celsius reading on the screen to a Fahrenheit one. This would be helpful, as many people are only familiar with the Fahrenheit scale.
Cauldryn Smart Thermos
Want to get the best of your smart thermos flask? Then try the Cauldryn, which, aside from the regulars, also features a convenient app. Not only that, but the app lets you change the temperature inside the mug. So you get a fully customized coffee mug.
Key Features
- Ergonomic black design
- Convenient smartphone app
- Thermostat function
- 100% rechargeable
- Power Saving mode
| Specifications | In the box |
| Capacity: 16 oz/473 ml Bottle size: 12*3.75 inch/ 305*95mm |
16-ounce travel mug Battery-saving desk base charger Quick Guide Charging power cord |
Smartphone App
This isn’t the first thermos to feature an app. But the app is unique in what it can do for you. You can set reminders for drinking water, and even control the temperature. This is a 16 fl oz bottle that gives you full control.
Thermostat Function
With the Cauldryn Smart Thermos, you can not only see the temperature of the contents but willingly change it. Use the smart app to set the internal temperature to your desired setting. This works great if you have to keep your coffee hot or your beverage cold.
Low Battery Life
With great features comes low battery life. This smart thermos’s battery will lose faster than it gains it, especially when you use the thermostat to boil the contents. Even if you connect it to the charger, it will surely take up more juice.
Ember Smart Thermos
As far as elegance goes, the NEW Ember Smart Thermos is pretty considerate of that. This smart thermos has a great looking ergonomic design, along with a thermostat feature and a smart app. The best part is that you don’t even need the app for controlling the temperature. Simply press the buttons on the bottle itself to fiddle with the temperature.
Key Features
- Black elegant design with largemouth
- Thermostat feature
- Safe to wash and handle
- Safe for airplanes
- Bluetooth connectivity
| Specifications | In the box |
| Capacity: 12 oz/355 ml Bottle size: 7.9*3.14 inch/ 200*80mm |
12-ounce travel mug Quick Guide Charging coaster |
Thermostat Feature
This Ember Smart Thermos features a thermostat that lets you control the temperature. You can not only do this from the app but from the bottle itself. Simply press the ‘+’ button to increase the temperature and the ‘-‘button to decrease it.
Safe to Wash
The mug is not only safe to drink but safe to wash as well. This thermos is IPX7 certified and life is made leak-proof. So you can wash the entire mug without worrying about damaging the internal components. This makes it best for washing out coffee and burnt sugar.
Short Battery Life
As is common with most thermostat mugs, the Ember thermos has a very short battery life of about 3 hours. However, it is recommended to use it while it’s charging on the coaster. You won’t always be able to find an outlet, so it’s not all that helpful.
Smart Vacuum Flask
Here’s another smart thermos vacuum flask, this one by BWilkon. It doesn’t include any of the fancy features like temperature control. But as we’ve seen before, extra features tend to drain a lot of battery life. This vacuum flask never runs out of juice, nor does it have a small capacity. This is the perfect water bottle within a limited budget.
Key Features
- LED panel that displays the temperature
- A detachable tea strainer
- Food grade material
- Leak-proof lid
- 15-ounce large capacity
| Specifications | In the box |
| Capacity: 15 oz/450 ml Bottle size: 9.06*2.56 inch/ 230*65mm |
15-ounce smart thermos Battery Instructions |
Detachable Tea Strainer
This isn’t a feature unique to the BWilkon, as many flasks have it. But I thought to include it here. This thermos comes with a detachable tea strainer. So you can make tea directly in the flask and keep it hot all day long. This feature is extremely helpful, especially in sieving out impurities.
Food Grade Steel
The BWilkon uses an 18/8 stainless steel construction that is approved by many authorities. It’s 100% food-friendly and doesn’t spoil or poison the liquid inside. This makes it perfect for use in thermoses and flasks.
Thermometer Issues
Some thermometer issues are pretty consistent with this smart thermos. Sometimes, the thermometer can take up to 20 minutes to get fully calibrated. So your beverage’s temperature may be lower than what is shown.
Buying Guide
What exactly makes a smart thermos better than older flasks? There are a lot of features that you should look for to make sure you have the best thermos flask. For this, here’s my recommended list of features, and how to choose your very own thermos.
Size
The size of the thermos will affect its functionality a lot. While most thermoses have an inner capacity of about 17 fluid ounces, some can go as low as 12 ounces. It is important to note that the size of the exterior of the thermos doesn’t matter.
In most cases, these flasks have tons of layers. So while the exterior may be enormous, the actual capacity may differ.
Given that, the size of your smart thermos shouldn’t be too big to carry either. Many come with carrying pouches, and a lot of them can fit inside a suitcase or a hand carry.
Materials
Most thermos flasks are made from stainless steel. They can have as many as 6 layers, but mostly the inner and outermost layers are made from stainless steel. The stainless steel should be food-grade, and should not release any toxins into the beverages.
A lot of the thermos flasks nowadays have a vacuum insulation layer that keeps your contents insulated. This layer is sandwiched between the stainless steel layers. Also, the exterior is mostly spray painted, so make sure the paint used is lead and BPA free.
Efficiency
More importantly, you should check the efficiency of the thermos. Thermos flasks, even with all those extra features, at the very basic are meant to keep your drinks warm.
If they can’t do that, then they are completely useless to you. Essentially, you should go for a smart thermos that is able to calibrate the temperature faster.
Some thermometers can take up to 20 minutes to fully calibrate. So always be careful of the accuracy of the thermometer.
Lid
It isn’t much you can look for in the lid. Most lids have an LED panel with a thermometer integrated into them. The LED panel provides an insight into how hot or cold the contents of the bottle are. This panel should be easy to read with bright white or blue digits. And the panel should be shatter-proof, as the lid is very prone to falling.
Other than that, the lid should be leak-proof. Many thermos flasks don’t have this feature, and as a result, your beverage could leak out.
Durability
With stainless steel construction, you would pretty much expect godly levels of durability. However, some smart thermos flasks are a complete scam. They’ll claim to be made of high-grade steel but actually be made of some cheap iron.
Furthermore, some thermos flasks do a horrible job of keeping your drinks warm. The max amount of time they can work is 24 hours. And many, especially the battery-powered ones, may not last even 3 hours. So always be wary of that.
Frequently Asked Questions
How does a thermos work?
Smart thermos flasks work on a very simple principle. They make use of the reflective nature of mirrors and shiny surfaces. The interior of the thermos flask is lined with shiny metal, usually stainless steel. The highly reflective surface of this metal reflects any heat instead of absorbing it. In this way, the heat inside the thermos is completely trapped, with no outlet.
These flasks work the same way with cold beverages. Cold objects lack heat, and the heavy amount of insulation in the flask prevents any heat from entering the system. However, cold beverages are lesser effectively-preserved as compared to hot beverages.
Can I put a thermos in a microwave?
I would not recommend it. Many smart thermos flasks use aluminum, which is hazardous in the microwave. Your microwave could blow up, or the content could spill and ruin everything. At best, I recommend removing the contents and placing them in a microwave-safe bowl.
If you want to preheat your thermos, then run it under some hot water. Let the water fill the thermos then dump it a couple of times. This should preheat the thermos pretty well.
Are thermoses dishwasher-safe?
Many are, but not all. Putting them in the dishwasher can reduce the shine and risk damage to the paint job. Other than that, your thermos should be leak and thus water-proof. So no need to worry about water getting in it!
It is recommended to hand wash your smart thermos to keep the shine intact. But this differs from product to product and from brand to brand. Read the washing instructions from the manufacturers that should come with an authentic thermos. Follow them carefully, as the warranty will depend on how you handle it too.
Conclusion
Smart thermos flasks have definitely changed the way we drink. You now no longer have to worry about your coffees getting cold, or your colas getting warm. Thermos flasks not only keep the heat in but also the excitement and joy. Taking one on your next trip might just be the best decision you’ll make this year.
Of the seven thermos flasks that I reviewed, I found that the DAWAY was the best one. It has an amazing battery life and keeps the contents heated for longer than any other thermos.
So remember to take your favorite thermos on your next trip. Trust me, you won’t regret it!
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I have over 15 years of knowledge in the technology field. Studied IT systems administration and now installing security cameras and smart home devices into user’s homes and offices.