<h2>Stay at the Perfect Temperature All Day Long</h2> <p>Meet your new go-to drinkware companion — the <strong>304 Stainless Steel Double-Wall Vacuum Thermal Mug</strong>. Whether you're savoring a morning coffee at your desk, commuting, or heading out on an adventure, this sleek 400ml insulated cup keeps your hot drinks hot and cold drinks cold for hours. Made in Mainland China.</p> <h2>Why You'll Love This Thermal Mug</h2> <ul> <li> <strong>Premium 304 Stainless Steel:</strong> Food-grade, corrosion-resistant, and free from harmful chemicals — built to last for years of daily use.</li> <li> <strong>Double-Wall Vacuum Insulation:</strong> The sealed vacuum layer locks in temperature, keeping beverages warm or chilled for hours — perfect for both cold winters and hot summers.</li> <li> <strong>Spill-Resistant Lid:</strong> The secure-fitting lid helps prevent leaks and spills, so you can toss it in your bag without worry.</li> <li> <strong>Compact &amp; Portable Design:</strong> At just 400ml and 10.5 × 9 cm, it slips easily into a backpack, tote, or car cup holder — ideal for the office, travel, or daily errands.</li> <li> <strong>Modern Aesthetic:</strong> Available in classic White, sleek Black, and warm Brown — a style to match every personality.</li> </ul> <h2>Product Specifications</h2> <table> <tr> <td><strong>Material</strong></td> <td>304 Stainless Steel + PP Lid</td> </tr> <tr> <td><strong>Capacity</strong></td> <td>400ml</td> </tr> <tr> <td><strong>Dimensions</strong></td> <td>10.5 × 9 cm (4.13 × 3.54 in)</td> </tr> <tr> <td><strong>Available Colors</strong></td> <td>White, Black, Brown</td> </tr> <tr> <td><strong>Package Contents</strong></td> <td>1 × Thermal Mug with Lid</td> </tr> </table> <h2>Perfect For Every Occasion</h2> <p>Whether you need a reliable office desk companion or a compact travel mug for weekend getaways, this vacuum flask delivers consistent performance. Pair it with other great kitchen and home tools from our store:</p> <ul> <li><a href="/products/1pc-household-stainless-steel-kitchen-frying-mold-potato-cake-tool-spoon-fried-food-mold-kitchen-cooking-tools">1PC Household Stainless Steel Kitchen Frying Mold</a></li> <li><a href="/products/1pc-versatile-spiral-slicer-for-cucumbers-carrots-potatoes-durable-kitchen-gadget">1PC Versatile Spiral Slicer for Cucumbers, Carrots &amp; Potatoes</a></li> <li><a href="/products/2pcs-thickened-oven-mitts-heat-resistant-kitchen-gloves-microwave-baking-gloves-machine-washable-essential-kitchen-tool-for-hot">2Pcs Thickened Oven Mitts Heat-Resistant Kitchen Gloves</a></li> </ul> <p><em>Note: Due to different lighting and screen settings, the actual color may vary slightly from images. Please allow a 1–2 cm measurement difference due to manual measuring methods.</em></p> <p>Learn more: <a href="https://www.nutrition.gov/topics/shopping-cooking-and-food-safety" target="_blank" rel="noopener">Nutrition.gov on cooking and food safety</a></p> <h3>Frequently Asked Questions</h3> <h4>Q: How long does the 304 stainless steel thermal mug keep drinks hot or cold?</h4> <p>A: Thanks to the double-wall vacuum insulation design, this 400ml thermal mug can maintain the temperature of hot beverages for several hours and keep cold drinks refreshingly chilled for an extended period — making it ideal for long workdays, commutes, and travel.</p> <h4>Q: Is the 304 stainless steel thermal mug safe for everyday use?</h4> <p>A: Yes! The mug is constructed from food-grade 304 stainless steel, which is non-toxic, corrosion-resistant, and free from harmful chemicals, making it safe for daily use with any hot or cold beverage.</p> <h4>Q: Is this vacuum flask easy to clean?</h4> <p>A: The wide-mouth design and smooth stainless steel interior make this thermal mug easy to rinse and clean by hand. We recommend hand washing to preserve the vacuum insulation and extend the mug's lifespan.</p> <h4>Q: What colors is the 400ml thermal mug available in?</h4> <p>A: Th