Ember CM21XL17AM
Ember Tumbler Instruction Manual
Model: CM21XL17AM
Introduction
Welcome to the world of perfectly temperature-controlled beverages with your new Ember Tumbler. This innovative travel mug is designed to keep your drink at your preferred temperature for hours, ensuring every sip is as enjoyable as the first. The Ember Tumbler combines durable stainless steel construction with smart technology, offering an unparalleled drinking experience.
Key features include:
- 3-Hour Battery Life: Maintains your desired temperature (between 120°F - 145°F) for up to 3 hours on a full charge, or all day when placed on its charging coaster.
- Beyond Insulation: Experience the warmth of your drink directly through the premium textured finish, offering the benefits of insulation without the drawbacks.
- Adventure Ready: Equipped with two versatile lids and an IPX7 rating for full underwater submersion up to 1 meter, making it ideal for various activities and easy to clean.
- Perfect Temperature Every Time: Multiple integrated sensors ensure precise temperature control and liquid level detection. Adjust the temperature to the exact degree using the Ember App.
- Our Biggest Mug Yet: At 16 oz, this is Ember's largest heated temperature control mug to date, perfect for your favorite grande lattes and more.

Image: The Ember Tumbler in Slate Black, resting on its charging coaster.
Setup
1. Initial Charging
Before first use, fully charge your Ember Tumbler. Place the tumbler onto the included charging coaster. The LED light on the tumbler will indicate charging status. A full charge typically takes approximately 2-3 hours.

Image: Ember Tumbler displaying battery charge level while on its charging coaster.
2. Download the Ember App
For full control and customization, download the Ember app from your smartphone's app store (available for iOS and Android). The app allows you to set precise temperatures, customize presets, and receive notifications.
3. Pair Your Tumbler
Open the Ember app and follow the on-screen instructions to pair your Tumbler. Ensure Bluetooth is enabled on your device. The app will guide you through the pairing process, which usually involves pressing the Ember logo on the bottom of the tumbler.
Operating Instructions
1. Filling Your Tumbler
Pour your hot beverage into the Ember Tumbler. The tumbler's sensors will detect the liquid and begin heating or maintaining the temperature according to your settings.
2. Temperature Control
Use the Ember app to set your desired drinking temperature between 120°F (49°C) and 145°F (63°C). The tumbler will automatically adjust to reach and maintain this temperature.

Image: Diagram highlighting the multiple precision temperature and liquid sensors within the Ember Tumbler.
3. Using the Lids
Your Ember Tumbler comes with two lid options to suit your lifestyle:
- Handle Lid: This lid features a convenient handle for easy carrying and is designed for secure transport. It screws onto the tumbler for a tight seal.
- Sliding Lid: Ideal for quick access to your drink, this lid slides open and closed. It provides a secure fit but is not fully leak-proof if the tumbler is inverted.

Image: The two distinct lid types for the Ember Tumbler: the Handle Lid and the Sliding Lid.
Maintenance
Cleaning Instructions
The Ember Tumbler is designed for easy cleaning. It is IPX7 rated, meaning it can be fully submerged in water up to 1 meter deep. However, for optimal care, hand washing is recommended.
- Wash the tumbler and lids with warm, soapy water.
- Use a soft sponge or cloth to clean the interior and exterior. Avoid abrasive cleaners or scrubbers that could damage the finish.
- Rinse thoroughly and allow all components to air dry completely before reassembly or storage.
- Do not place the charging coaster in water or wash it. Wipe it clean with a damp cloth if necessary.

Image: The Ember Tumbler submerged in water, illustrating its IPX7 water resistance for easy cleaning.
Troubleshooting
If you encounter any issues with your Ember Tumbler, please refer to the common solutions below:
| Problem | Possible Cause / Solution |
|---|---|
| Tumbler not heating. |
|
| App not connecting to Tumbler. |
|
| Battery life is shorter than expected. |
|
| Lid leaks. |
|
For further assistance, please visit the official Ember support website or contact customer service.
Specifications
| Feature | Detail |
|---|---|
| Brand | Ember |
| Model Number | CM21XL17AM |
| Color | Slate Black |
| Capacity | 16 oz |
| Product Dimensions | 3.27"W x 7"H |
| Item Weight | 1.2 pounds |
| Material | Stainless Steel (BPA Free, Lead Free) |
| Temperature Range | 120°F - 145°F (49°C - 63°C) |
| Battery Life | Up to 3 hours (or all day on charging coaster) |
| Water Resistance | IPX7 rated (submersible up to 1 meter) |
| Included Components | Tumbler, Charging Coaster, Power Adapter, Two Lids (Handle Lid, Sliding Lid) |
| Product Care | Hand Wash Only |
| UPC | 810011402508 |
Warranty and Support
For detailed warranty information and customer support, please refer to the official Ember website or the documentation included with your purchase. You can typically find information regarding product registration, warranty claims, and technical assistance there.
Visit the Ember Store on Amazon for more products and information.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.







