Warm Up With These 15 Heat-Sensitive Mugs


With the cold weather, you’re probably going to be drinking a lot of hot cocoa. Get your drink on in style with these mugs that change when filled with hot liquids.

Mental Floss has affiliate relationships with certain retailers and may receive a small percentage of any sale. But we only get commission on items you buy and don’t return, so we’re only happy if you’re happy. Thanks for helping us pay the bills!


What seems like a normal night sky is actually filled with constellations. Some hot water will reveal them to you—since constellations never look like anything without the drawn lines.

Buy on Amazon.


Some hot coffee turns these dinosaurs into fossils, just like that comet did.

Buy on Amazon.

3. WAKE UP; $7.32

This cup will mirror your own face as you drink your morning coffee.

Buy on Amazon.


Pour in your drink, and the feline from Alice in Wonderland disappears to just a grin, in typical Cheshire Cat fashion.

Buy on Amazon.


This mug tells you when you need to recharge (reheat) your drink.

Buy on AliExpress.


Video game lovers will be soothed by the appearance of a full red heart. Just don’t get injured sipping on that hot cocoa.

Buy on Amazon.

7. PAC-MAN; $14.99

Filling up this mug is a lot like putting a quarter in the classic arcade game.

Buy on Amazon.

8. TETRIS; $10

Perfect for video game lovers who have a hard time looking away from their console.

Buy on Amazon.


The TARDIS never stays in one place for long—as you’ll soon discover with this mug. Add hot liquid and your time machine will transport it from an English street to deep space.

Buy on Amazon.

10. PICK A BEAR; $14.02

Empty, this sleepy bear is all black. Full, it becomes an alert panda.

Buy on Amazon.


Once you fill this cup, Henry VIII's wives fade away, leaving only their cause of death.

Buy on Amazon.

12. WINTER IS COMING; $15.94

The Starks know cold, but they also know how to keep warm. Cuddle up with your mug and the Starks' house words of warning.

Buy on Amazon.


What seems like an unassuming black mug is actually a super cool Batman mug in disguise.

Buy on Amazon.

14. SAVE CHRISTMAS; $14.75

Santa can’t navigate his sleigh until you’ve had your morning coffee.

Buy on Amazon.


The aurora borealis can be elusive in real life, but it just takes some hot coffee to make the lights appear on your mug.

Buy on ThinkGeek.

The ChopBox Smart Cutting Board Has a Food Scale, Timer, and Knife Sharper Built Right Into It


When it comes to furnishing your kitchen with all of the appliances necessary to cook night in and night out, you’ll probably find yourself running out of counter space in a hurry. The ChopBox, which is available on Indiegogo and dubs itself “The World’s First Smart Cutting Board,” looks to fix that by cramming a bunch of kitchen necessities right into one cutting board.

In addition to giving you a knife-resistant bamboo surface to slice and dice on, the ChopBox features a built-in digital scale that weighs up to 6.6 pounds of food, a nine-hour kitchen timer, and two knife sharpeners. It also sports a groove on its surface to catch any liquid runoff that may be produced by the food and has a second pull-out cutting board that doubles as a serving tray.

There’s a 254nm UVC light featured on the board, which the company says “is guaranteed to kill 99.99% of germs and bacteria" after a minute of exposure. If you’re more of a traditionalist when it comes to cleanliness, the ChopBox is completely waterproof (but not dishwasher-safe) so you can wash and scrub to your heart’s content without worry. 

According to the company, a single one-hour charge will give you 30 days of battery life, and can be recharged through a Micro USB port.

The ChopBox reached its $10,000 crowdfunding goal just 10 minutes after launching its campaign, but you can still contribute at different tiers. Once it’s officially released, the ChopBox will retail for $200, but you can get one for $100 if you pledge now. You can purchase the ChopBox on Indiegogo here.

Mental Floss has affiliate relationships with certain retailers and may receive a small percentage of any sale. But we choose all products independently and only get commission on items you buy and don't return, so we're only happy if you're happy. Thanks for helping us pay the bills!

Stanley's Insulated Coffee Mugs Ensure Your Drink Remains Hot (or Iced) All Day Long

Stanley's Master Unbreakable Trigger-Action Mug (left) and Go Tumbler (right).
Stanley's Master Unbreakable Trigger-Action Mug (left) and Go Tumbler (right).

Having a designated workspace in your home office is necessary for maintaining focus throughout the day, but if you really want to stay razor-sharp, you'll need a dependable cup of coffee by your side. With Stanley's line of insulated mugs, you can keep your coffee—hot or iced—at the ideal temperature all throughout the workday, so you won't have to soldier through another sip of a lukewarm disappointment.

The line is highlighted by Stanley's 24-ounce Go Tumbler ($26), which has a splash-proof lid that can help prevent unfortunate spills wherever you happen to be working. Made with stainless steel and double-wall vacuum insulation, this tumbler is built to keep your coffee hot for up to six hours or cold for up to 40 hours.

The Classic Trigger Action Travel Mug from Stanley.
The Classic Trigger Action Travel Mug

The Classic Trigger-Action Mug ($23) has a push-button lid that’s easy to open. Like the Go Tumbler, it has double-wall vacuum insulation that keeps beverages hot for up to seven hours or ice-cold for up to 30 hours.

Stanley also offers the Master Unbreakable Trigger-Action Mug ($50), which boasts similar insulation and is made with the thickest stainless steel currently on the market, according to the company. All three models are safe to go in the dishwasher, so you'll have one less thing in your kitchen to worry about.

Now that you have the perfect mug, make sure you’re filling it with a great cup of coffee. Here are 11 tips on how to brew better coffee at home.

At Mental Floss, we only write about the products we love and want to share with our readers, so all products are chosen independently by our editors. Mental Floss has affiliate relationships with certain retailers and may receive a percentage of any sale made from the links on this page. Prices and availability are accurate as of the time of publication.