Product Overview
The Sistema Microwave Soup Mug is designed for convenient heating of soups, stews, noodles, and hot beverages. Its robust construction and thoughtful features ensure ease of use and safety in microwave applications.

Image: The Sistema Microwave Soup Mug in red, with its clear lid and steam release vent, filled with a yellow soup and garnished with a green herb. The mug features a comfortable handle and secure locking clips.
Key Features
- Capacity: 22.1 Ounces / 656 Milliliters.
- Material: 100% Virgin plastic, Phthalate- and BPA-free.
- Lid with Steam Release Vent: Designed for splatter-free heating and proper steam release during microwave use.
- Easy-Lift Tabs: Cool-to-the-touch tabs for safe and easy opening after heating.
- Integrated Handle: Provides a secure and comfortable grip.
- Versatile Use: Suitable for microwave, fridge, and freezer.
- Cleaning: Top-rack dishwasher-safe.
Setup
- Unpack: Remove all packaging materials and labels from the soup mug.
- Initial Cleaning: Before first use, wash the soup mug and lid thoroughly with warm, soapy water or place on the top rack of your dishwasher. Rinse completely and dry.
- Inspection: Ensure all components are intact and free from damage.
Operating Instructions (Microwave Use)
- Fill: Pour your desired soup, stew, noodles, or beverage into the mug. Do not overfill; leave sufficient space for expansion during heating.
- Secure Lid: Place the lid securely onto the mug, ensuring the locking clips on the sides are fastened.
- Open Steam Vent: Before placing in the microwave, open the steam release vent on the top of the lid. This is crucial for proper heating and to prevent pressure buildup.
- Microwave: Place the mug in the microwave. Heat for the recommended time for your food item. Heating times may vary based on microwave wattage and food quantity.
- Check Temperature: Carefully remove the mug from the microwave using the handle. Use caution as contents will be hot. Stir the contents and check for even heating. If necessary, continue heating in short intervals.
- Serve: Once heated to your satisfaction, close the steam vent before serving if desired, or leave open to cool slightly.

Image: A hand pressing the red steam release vent on the clear lid of the Sistema Microwave Soup Mug. This action opens the vent, allowing steam to escape during microwave heating.
Cleaning and Maintenance
- Dishwasher Safe: The Sistema Microwave Soup Mug is safe for cleaning on the top rack of your dishwasher.
- Hand Washing: For best results and to prolong product life, hand wash with warm, soapy water. Rinse thoroughly.
- Stain Removal: To prevent staining, wash immediately after use, especially with foods containing strong pigments like tomato sauce.
Storage
- Refrigeration: The mug is safe for storing food in the refrigerator. Ensure the steam vent is closed for airtight storage.
- Freezing: The mug is also freezer-safe. Allow hot food to cool before freezing.
- Stacking: For efficient storage, the mugs can be stacked when empty.
Safety Information
- Microwave Use: Always ensure the steam release vent is OPEN when microwaving to prevent pressure buildup and potential injury.
- Hot Contents: Contents will be hot after microwaving. Use the cool-to-the-touch tabs and handle with care.
- Material Safety: Made from 100% virgin plastic, Phthalate- and BPA-free.
- Convection Ovens: DO NOT use in a convection oven.
- High Oil/Sugar Content: Avoid heating foods high in oil or sugar for extended periods, as these can reach very high temperatures and potentially damage the plastic.

Image: Icons indicating the Sistema Microwave Soup Mug is microwave safe, stackable, freezer safe, not for use in convection ovens, and top-rack dishwasher safe.
Troubleshooting
- Leakage during Transport: While the lid provides a secure seal, the steam vent is designed to release pressure. For liquid-heavy contents, ensure the mug is kept upright during transport to prevent minor leakage through the vent.
- Uneven Heating: Stir contents halfway through heating and allow a standing time after microwaving to ensure even temperature distribution.
- Plastic Warping/Damage: Ensure the steam vent is always open during microwaving. Avoid overheating, especially with foods high in oil or sugar.
Specifications
| Brand | Sistema |
| Model | SKWWF21 |
| Material | Plastic (100% Virgin, BPA-free, Phthalate-free) |
| Color | Red |
| Capacity | 22.1 Ounces / 656 Milliliters |
| Item Dimensions (L x W x H) | 4.5 x 4.5 x 4.6 inches |
| Item Weight | 0.11 Kilograms |
| Care Instructions | Dishwasher Safe (Top Rack), Microwave Safe (with vent open), Fridge Safe, Freezer Safe |
Warranty and Support
Warranty: Sistema offers a lifetime warranty for defective products. Please retain your proof of purchase for any warranty claims.
For further assistance or product inquiries, please visit the official Sistema website or contact their customer support.
Official Product Video
Video: This official Sistema video demonstrates the key features and usage of the Microwave Soup Mug, including its steam release vent and microwave heating process. It shows the mug being filled, microwaved, and then enjoyed with additions like cream and pepper.





