Introduction
The ZWILLING Thermo 23.6 oz Food Jar is designed for transporting and maintaining the temperature of your meals and beverages. Its double-walled vacuum insulation, constructed from 18/10 stainless steel, ensures that hot food and drinks remain hot for up to 8 hours, and cold items stay chilled for up to 11 hours. This durable and reusable food jar is a practical solution for on-the-go meals, whether for work, school, or outdoor activities.
Key features include a leak-proof design, a lid that doubles as a bowl, and a convenient foldable metal spoon integrated into the lid for immediate use.
Product Overview

Image: ZWILLING Thermo 23.6 oz Food Jar in Matte Black, showcasing its sleek design.
- Double-Walled Insulation: Made of 18/10 stainless steel for superior temperature retention.
- Temperature Retention: Keeps food hot for up to 8 hours and cold for up to 11 hours.
- Leak-Proof Design: Ensures secure transport without spills.
- Integrated Spoon: Lid includes a foldable metal spoon for convenience.
- Lid as Bowl: The outer lid can be used as a serving bowl.
- Durable Construction: Designed for long-lasting use.
Setup
Initial Cleaning
Before first use, wash all parts of the ZWILLING Thermo Food Jar with warm, soapy water. Rinse thoroughly and allow to air dry. This ensures hygiene and removes any manufacturing residues.
Pre-heating or Pre-chilling (Recommended)
To maximize temperature retention, pre-heat or pre-chill the food jar:
- For Hot Food: Fill the jar with hot water (not boiling) for 5-10 minutes. Empty the water before adding your hot food.
- For Cold Food: Fill the jar with cold water or ice cubes for 5-10 minutes. Empty the water/ice before adding your cold food.
Operating Instructions
Filling the Food Jar
- Ensure the jar is clean and, if desired, pre-heated or pre-chilled.
- Carefully place your food or beverage into the main compartment of the jar.
- If using the internal container for separating foods, place it inside the main compartment before sealing.
- Securely screw on the inner lid, ensuring a tight seal to prevent leaks and maintain temperature.
- Screw on the outer lid firmly.

Image: The ZWILLING Thermo Food Jar with its lid removed, revealing the inner compartment and the foldable spoon.
Using the Foldable Spoon
The ZWILLING Thermo Food Jar comes with a compact, foldable metal spoon stored within the lid. To use, simply unfold the spoon. After use, fold it back and store it securely in its designated slot in the lid.

Image: Close-up of the ZWILLING Thermo Food Jar lid, showing the integrated foldable metal spoon.
Using the Lid as a Bowl
The outer lid of the food jar is designed to function as a convenient serving bowl, allowing you to enjoy your meal directly from it.
Maintenance and Cleaning
General Cleaning
- Wash the food jar and all its components after each use.
- Use warm, soapy water and a soft sponge or brush.
- Rinse thoroughly with clean water.
- Ensure all parts are completely dry before reassembling or storing to prevent odors or mildew.
Dishwasher Safety
The ZWILLING Thermo Food Jar is dishwasher safe. For best results and to prolong the life of the product, place it on the top rack of your dishwasher.
Important Notes
- Do not use abrasive cleaners, scrubbers, or bleach, as these can damage the finish and seals.
- Do not microwave the food jar.
- Ensure all seals are properly in place after cleaning to maintain leak-proof performance.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Food not staying hot/cold | Improper pre-heating/chilling; lid not sealed tightly; extreme external temperatures. | Ensure proper pre-heating/chilling as described in the "Setup" section. Verify that the inner and outer lids are screwed on tightly. Avoid leaving the jar in direct sunlight or extreme cold for extended periods. |
| Leaking | Lid not sealed properly; damaged seal. | Check that both inner and outer lids are securely tightened. Inspect the silicone seals for any damage or misalignment. Replace seals if necessary. |
| Difficulty opening lid | Vacuum pressure buildup; lid overtightened. | If there's a small pressure release button/valve, press it. Try running the lid under warm water for a few seconds to expand it slightly. |
Specifications
- Model Number: 39500-510
- Capacity: 23.6 ounces (669 Milliliters)
- Material: 18/10 Stainless Steel, Plastic
- Color: Matte Black
- Product Dimensions: 7.12"L x 4.37"W x 4.37"H
- Item Weight: 1.26 Pounds
- Dishwasher Safe: Yes
- Microwaveable: No
- Special Feature: Insulated
- Closure Type: Flip Top (referring to the inner lid mechanism, outer is screw-on)
- Container Shape: Round
Official Product Video
Video: ZWILLING Brand Moments. This video showcases various ZWILLING products, including the Thermo Food Jar, in use during meal preparation and enjoyment, highlighting the brand's quality and lifestyle integration.
Warranty and Support
ZWILLING products are manufactured to high-quality standards and come with a manufacturer's warranty. For specific warranty details, product support, or to inquire about replacement parts, please visit the official ZWILLING website or contact their customer service directly. Keep your proof of purchase for warranty claims.
ZWILLING Customer Service: Contact Us





