Customer Ratings & Reviews

This thing is wonderful for morning coffees - if you have an outlet near a side table the dock is great to have handy and not an eyesore. Only thing I'd say is opt for the 14oz if you're a heavy coffee drinker.

The charge doesn’t last very long. I like It, for about 1 1/2 hours. For $100+, I’d expect 3 hours or longer off the charger.

I Love my mug one charge will keep my mug hot for a good 5 cups of tea which is good for me the best Birthday gift !

I love this mug but after one month of using it, the bottom of the mug started to have a brown scratched up stain. After reading the reviews, I was so paranoid and never used a coffee stirer in it, I washed it by hand without a sponge or anything abrasive, and "babied" it like a delicate flower. Unfortunately, the stain appeared within a month of using it daily. Also, the cup is fairly small so if you drink lattes in the morning, I'd recommend going for a larger size. Overall, I really like the mug, just wish I picked a different color.

The cup tends to work OK but it stains to easily and it’s hard to keep clean. I regret not getting the larger size cup.

This mug itself has been fantastic. A self-heating coffee cup, the future is here! The app and bluetooth connection can be a bit fiddly but when it works its a dream. After having this mug for under a year and a half having exclusively hand washed it, the inside of the mug is flaking off. Just a few months out of warranty and it's unusable in this state unless I would want to inevitably drink whatever material it's coated with. I've reached out to their support team and am waiting to hear back but in any case I would encourage researching the coating flaking issue online if you're considering anything from this line.

The mug’s quality and heating system is exceptional

One of the spring loaded pins in the coaster has had it's spring fail, causing it stay recessed & not make contact with the mug. Really disappointed with the timing of this failure, 3 days after warranty expiration. $40 for a new coaster. My wife does love it for her tea.

What a huge disappointment!! I like my coffee hot so I’ve been very careful with making sure the base is charged. What I didn’t plan for is the interior paint/coating to be chipping off ~ I’ve never put it in a dishwasher or used anything metal for stirring my coffee so I’m perplexed as to why this is happening. Tried customer service at Ember multiple times..no connection ~ no response!! For the cost of this mug there should be better customer service! What a BIG DISAPPOINTMENT!!

not a fan. $100 for a mug that is not dishwashable, cost 20x more than a $5 one, and make it feel like you basically only have 1 mug you want to use... just so that your coffee stays warm for like 30 minutes longer. you can even get a heated coaster for like 1/4th of the price on amazon, and it would work with ANY mug instead of only one, which you have to repeatedly handwash.

Inside of the cup started flaking after 7 months, Ember doesn’t reply to emails no number to reach them at just poor customer service.

I love the mug and it’s the perfect solution for me. It’s just the charging coaster that keeps failing since the two little pins get stuck. Ember has replaced it twice but I worry what will happen in 2 months when the mug is out of warranty.

It caught fire after 8 months and the manufacturer said I put it in the microwave without replacing it unde warranty

I received this mug as a gift, and it's perfect. I paired it with the app, which can be a little glitchy, but not a complete waste. You can control how hot you want you coffee, up to 145 degrees. Also, if you share your mug, or have the same color, you can customize the LED color to identify who the cups belongs to. You cannot microwave your cup, but honestly, I have poured in cold creamer and waited for my coffee to get hot just to experiment. It's neat. And if you pair the mug with the app, you can choose which temperature to maintain your coffee. I charge the cup after using it, and will simply take the cup with me to my home office for a few hours. Battery life away from the base depends on the maintained temperature. Overall, I love this mug, because it's not your typical mug plate where you have to keep the mug on the base. You can also wash the mug, but not keep it submerged in water, I recommended immediately washing it, or if you don't have time, fill with regular water to soak, turn off the base, and clean it later. Again, just don't submerge it or it will ruin your cup. All this is in the nifty packaging it comes with! I would recommend as a gift, buying it for yourself or to impress your guests.

I love my Ember mug. Is it expensive? Absolutely. Is it for everyone? Absolutely not. The app for iPhone is hit or miss, but allows you to set the colored light on the bottom as well as temperature preference. It tops out at 145 degrees which is plenty hot for me, I actually dialed it back to 140. This mug has mediocre battery life which is offset by a few factors, specifically sleep mode and the charging coaster. First, the mug can detect liquid inside and will not heat if it is empty, saving battery and allowing you a few cups full before having to charge up. For charging, the included coaster charges up quickly and allows you to keep your drink warm effectively indefinitely, which would be ideal for office workers and other more stationary tasks. It charges up quickly, I only wish the coaster connected via USB instead of a proprietary connection. The mug is IP67 and very easy to clean by hand and warm water. Just be sure to fully dry off the rings on the bottom before charging.

First, almost certainly your question, like mine was before I got my Ember, is can a mug really be worth the cost? Don't they make warming coasters for around $20 that will do the same thing? After using my Ember for 3 weeks is, without hesitation, yes it is worth the cost, and no, a mug warmer is nowhere near a replacement for what Ember can do. I drink between 5 and 10 cups of tea a day, and I got used to the phenomenon that I could drink it when it was scalding hot or I could drink it lukewarm, but I had about a 60-second window of that perfect sip of tea. I'm very precise with my food and drink (for example, I time my tea steeping for exactly 1 minute and 20 seconds and exactly 6 mL of lemon juice per cup), so having a tea mug that can get my tea to exactly the perfect temperature for every single sip, no matter how long it takes me to drink my tea (137 F, in case you're interested)? That sounded too good to be true. And yet, it is that perfect. It took a little tweaking at the beginning using the Ember app (Ember actually encourages you to tweak it to perfection; they give suggested temperatures, but they want you to find your exact sweet spot), but then it is zero maintenance after that. Whenever I pour tea into the mug, it can sense that there is fluid in the cup, and it begins the processes of allowing the tea to cool down to the right temperature and then maintaining that temperature until the very last drop. And, I really mean it, the very last drop (as a small note, the last drop is slightly hotter than the rest of the drink because it's been sitting on the heating element longest, but frankly, that's a joy to get a small burst in temperature rather than having the last sip be tepid as I've been used to). I even get an alert on my phone and Apple Watch letting me know that the mug has reached the correct temperature so I can start drinking it at exactly the temperature I wanted. Also, the mug works, for a while, off of the coaster. I keep my coaster on my desk, but I can get about 2 cups of tea between charges (depending on how fast I drink it), so I can have that same temperature expectations when I'm away from my desk. I wish the battery was a bit more substantial (2 hours would have been somewhat ideal) or if there was perhaps a portable charging station that holds a longer charge. Or, I wish an additional coaster was a bit less costly so I could have them at multiple points in my house for more convenient charging. But, now we're just getting into wishlist territory, and none of those are a reasons to knock the product down in rating. There is one design flaw that I think is somewhat problematic, and based on some other reviews, I'm a bit concerned that it will end up shortening the life of the charging coaster. The mug itself is water resistant, which is helpful for a product whose sole purpose is to contain water (it is not water resistant enough to let it run through the dishwasher, but hand washing a mug that I use many times a day is not a problem). However, if water gets on the sides of the mug, it naturally goes down the side, down the curve of the bottom, and into the seam at the rubber ring at the bottom. This is fine, except the charging coaster is not supposed to get any moisture in it at all. I usually wipe the bottom of the mug with a paper towel, touch it to feel if there is any moisture, and still about 30% of the time, when I pick the mug up from the coaster, there is a ring of moisture on the coaster itself. Because using the coaster while drinking from the mug is how you can use it somewhat indefinitely, it's not an option to just leave the mug off the coaster. I have read reviews stating that the charging nodes on the coaster get corroded because of the moisture, and I can see how even the most careful user could run into this issue. Other things I don't love about it: the handle is a bit uncomfortable because it has somewhat sharp edges, and the lip of the mug takes some getting used to for the same reason. They kept the mug walls very thin (it is actually stainless steel coated with ceramic, presumably to both control the temperature through the entire mug more efficiently and to keep the weight of the mug down as it's somewhat heavy because of the electronics stored in the bottom), which is fine, except it lends to sharper edges. I got used to both of those things pretty quickly and haven't thought about it for the last couple of weeks. However, as far as design goes, it's a very attractive mug, and remarkably, the sides are always cool to the touch, even immediately after pouring boiling water into it, so it is clearly an exceptionally designed mug. I could go on and on about it, but the bottom line is that this is, no doubt, a luxury. It feels really hard to justify paying $100+ for a mug. And yet, it has completely transformed how I drink my tea, and every bit for the better. And, aside from a one important design flaw, rarely do I see such perfect implementation of technology. Well done, Ember.

Great mug to keep my coffee hot! Got the stainless one because the plastic looking ones just looked cheap and they were almost the same price. The battery lasts about two hours. Normally, it won't take me that long, but I happen to leave the house one time and came back with my coffee still warm. The app said the battery was depleted and gave me the temperature. It was only off by a few degrees, so I figure two hours was about it. My cons with this: 1) the price. It's expensive for a mug. 2) At the time, this was the only size, 10oz. That's way too small. All my mugs are 12-16oz. This won't even hold a large brew on a Keurig. Huge negative. Now they have a 14oz one and, of course, you're going to pay for those few extra ounces.

I never realized how much the coffee drinking experience could have been improved with this cup. To pour a cup and get lost in work only to return and find the beverage the same perfect temperature (to the last sip) is heavenly. It literally puts a smile on my face every time. A start reduced for a a few reasons: - This color only comes in 10 ounces... I'd like to have it in a 12-ounce size. - The Android connectivity (or lack there of leaves a bit to be desired. Luckily once you set desired temperature in the mug you don't have to futz with it anymore. - The battery could be longer than 90 minutes. Sometimes I take a meeting away from the charger on my desk and the battery runs out... Then you really miss the experience

The conveniences and benefits come at the cost of one convenience, and it's that washing and caring for this mug is more of a hassle than for a regular/dishwasher safe mug. - it is also quite expensive. Though the cup can be safely submerged in water for the purposes of cleaning, water does seem to seep in between the rings and silicone base. Also, the stainless steel does stain very easily with turmeric-based teas and is very prone to scratching from cleaning pads, so be careful about that. I will give my personal wash/care routine at the end of this review for anyone interested. The reason why I still give this cup 5 stars is that it has two major benefits. The first is the obvious one, it keeps beverages nice and warm. I love that I never have to make trips to the microwave. I generally keep the mug on the charging coaster as this is necessary to keep beverages heated for longer than 30 or so minutes. However, the other major benefit, which I initially didn't anticipate, is that I never burn my tongue or expose myself to damagingly hot beverages when using this cup. It always let's me check and make sure that the tea I brewed in it has cooled to a safe and enjoyable temperature before I take that first sip. And then, it keeps it at that temperature! I will say that this cup is less effective at heating drinks up. This is because, unfortunately, it seems like the sensor in the cup gets confused when the temperature of liquids in the cup is equal to the temperature of the room. It thinks the cup is "empty" and stops heating the liquid up. It would be great if Ember could develop a "Heat" setting/function on the app, to let the cup know that there IS liquid in the cup and for it to keep heating past that room temperature confuse point. Now onto care/use guidelines: I usually only use this mug for straight teas and avoid putting milk or other additives that might burn or stain the bottom of the cup. I wash by shooting water up into the cup while holding it upside down to avoid getting the base wet. Then I wipe down with a microfiber cloth.

Received the mug as a gift. Overall it's okay, but expensive for what it is. It's a 10 oz mug to its brim so it only holds about 8 oz of fluid if you want to be able to carry it without spilling content (from the kitchen to your desk). I've had problems with the app and the mug disconnecting and that's a problem when the mug is full of hot fluid (press the bottom button to reconnect). Ideally you need to stir it, or give the mug a swirl as you drink (empty) the mug since the fluid at the bottom gets noticeably hotter the lower you get. There is some guilty pleasure when you finish something, reach for the mug and your drink is still hot.