Summary#
The Ember Tumbler is a 16oz app-controlled heated travel mug that holds your coffee or tea at an exact temperature you set, keeping it there for hours. It is the largest heated mug Ember makes, built for people who let their drink go cold.
At a Glance#
Product : Ember Tumbler Temperature Control Travel Mug (16oz)
Brand : Ember
Best For : Slow sippers and desk workers who hate lukewarm coffee and want it hot to the last drop
Connectivity : Ember app over Bluetooth
Buy Now : Ember Tumbler on Amazon
Key Highlights:
- Sets and holds an exact drinking temperature so your coffee never goes lukewarm
- A generous 16oz capacity, the largest heated mug Ember offers
- App control lets you dial temperature to the degree and get notified when it is ready
- Multiple sensors track temperature and liquid level for consistent heating
- Up to a few hours of active heating, or all day on its charging coaster
Who Should Buy This#
The Ember Tumbler is for people whose coffee sits and goes cold while they work, parent, or take calls. Instead of microwaving a stale reheat, it keeps the drink at the precise temperature you chose, so the last sip tastes like the first. The 16oz size is the draw here: it is Ember's largest, so it suits a full pour-over or a big morning coffee rather than a small mug. If a cold cup of coffee is a daily annoyance, this solves it directly.
Perfect for:
- Desk workers who get pulled into tasks and return to a cold cup an hour later
- Slow sippers who nurse a large coffee or tea over a long morning
- New parents whose hot drink inevitably waits while they tend to a baby
- Tea and specialty-coffee drinkers who care about a precise serving temperature
Design & Build Quality#
The Tumbler is a tall, stainless steel travel mug with a matte finish and a carry handle, styled to look like a premium tumbler rather than a gadget. It ships with two dishwasher-safe lids, a leak-proof handle lid for carrying and a spill-proof sliding lid for sipping, and the body is durable enough to submerge in water. The heating and electronics are hidden inside a double-wall body, and a set of internal sensors track both temperature and liquid level to keep the heat even as you drink it down. It charges on an included coaster that also keeps it hot indefinitely while parked on your desk.
Control happens through the Ember app over Bluetooth, where you set an exact target temperature and get a notification when your drink reaches it. Ember Tumbler on Amazon
Key Features#
Exact temperature, held#
The core trick is precision: you pick a drinking temperature and the Tumbler maintains it rather than letting the drink slide toward room temperature. That means no lukewarm middle and no microwave reheats, just a consistent cup from top to bottom.
Largest Ember capacity#
At 16oz, this is the biggest heated vessel Ember makes, sized for a full coffee rather than a modest mug. For anyone who found earlier Ember mugs too small, the Tumbler is the answer.
App control and sensors#
The Ember app lets you set the temperature to the degree, save presets, and get a ready notification. Inside, multiple sensors read temperature and liquid level so the heating stays accurate as the level drops.
All-day on the coaster#
On battery it delivers a few hours of active heating for the desk or the couch, and its charging coaster keeps it hot all day when parked, so a stationary drink effectively never cools.
Technical Specifications#
Capacity : 16oz
Material : Stainless steel, double-wall
Control : Ember app over Bluetooth
Temperature Range : Roughly 120 to 145 degrees Fahrenheit
Sensors : Temperature and liquid-level detection
Battery : A few hours of active heating on a charge
Charging : Included charging coaster for all-day warmth
Lids : Leak-proof handle lid and spill-proof sliding lid, both dishwasher-safe
Notifications : Alerts when your drink reaches the set temperature
Presets : Saved temperature settings in the app
Pros & Cons#
Pros:
- Holds an exact temperature so coffee never goes lukewarm
- Largest Ember capacity suits a full-size coffee or tea
- App control to the degree with a ready notification
- Charging coaster keeps a desk drink hot all day
- Premium stainless build looks like a normal travel mug
Cons:
- Battery only actively heats for a few hours away from the coaster
- Requires the app and Bluetooth for full temperature control
- A significant premium over an ordinary insulated tumbler
- Electronics mean more careful cleaning than a plain mug
Final Verdict#
Buy it. The Ember Tumbler solves one everyday annoyance completely: it keeps a large coffee or tea at the exact temperature you want for hours, so a forgotten cup is never a cold one.
Our recommendation: Keep the charging coaster on your desk so the Tumbler stays hot all day, set your ideal temperature once as a preset, and let the app ping you when it is ready to sip. Ember Tumbler on Amazon