Ember
Ember Temperature Control Smart Mug
### Overview
The Ember Temperature Control Smart Mug² is a app-connected, self-heating ceramic-coated mug available in 10 oz and 14 oz sizes. Designed for home or office use, it goes beyond simply keeping coffee hot — it lets you set an exact drinking temperature so your beverage is never too hot or too cold. It carries strong user ratings across major retailers, with over 13,000 reviews on Walmart averaging 4.4–4.5 out of 5 stars.
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### Standout Features
- **Precise temperature control:** The mug lets you set a precise temperature anywhere between 120°F and 145°F (50°C–62.5°C). - **App or standalone use:** You can pair it with the Ember app to set temperatures and receive notifications, or use it without the app — it defaults to 135°F and remembers your last setting. - **Smart auto-sleep:** The mug features an auto-sleep mode that intelligently senses when to turn on and off, entering sleep when empty or after two hours of inactivity. - **All-day warmth on the coaster:** The built-in battery maintains your chosen temperature for up to 1.5 hours, or all day when used with the included charging coaster. - **LED status indicator:** An LED light indicates when the mug is working to reach your target temperature and when it's ready to drink. - **IPX7 water resistance:** The mug features an updated scratch-resistant coating, is rated IPX7, and is fully submersible up to 1 meter for easy cleaning.
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### Who It's For
If you're a slow sipper who values the experience of a consistently perfect temperature, this is a luxury that genuinely improves the daily coffee ritual. It's designed for home or office use, making it especially well-suited for desk workers who tend to get distracted and return to a cold cup. It also makes a popular gift for coffee and tea enthusiasts who take their brew seriously.
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### Important Considerations
- **Premium price:** The 14 oz model starts at around $104.99, which is a significant investment for a mug — and the charging coaster is a required accessory for all-day use. - **Battery life off the coaster is limited:** At the highest heat setting, the battery can drain in under an hour, so this mug works best when kept near its coaster. - **Not for on-the-go use:** The standard Mug² is not spill-proof or travel-ready; a separate (and pricier) Travel Mug model exists for commuters. - **Hand wash only:** Do not put the Ember Mug² in the microwave, and despite its IPX7 rating, it is hand wash only — not dishwasher safe. - **Narrow temperature range:** If you drink your coffee quickly, a standard insulated mug is a more practical and far less expensive choice.
Seen at 7 retailers from $59.99 to $129.95 as of 2026-06-16. Prices change — check the retailer for the current price.