Thermos Ume 400ml Vacuum Insulated Bottle - One-Touch Japanese Design

5. Who is this for?

1. The Urban Commuter Who Wants Effortless Hydration

You navigate busy city life and need a bottle that keeps drinks hot or cold for hours with a simple one-touch lid, fitting perfectly in your bag or car cup holder.

2. The Wellness Enthusiast Who Wants Mindful Rituals

You value intentional self-care and appreciate the clean, minimalist Japanese design that makes staying hydrated feel like a calming, daily ritual rather than a chore.

3. The Design-Conscious Professional Who Wants Subtle Sophistication

You appreciate functional elegance and want a high-performance bottle with an aesthetic that looks refined in your office, meetings, or home workspace, not like gym gear.

4. The On-the-Go Parent Who Wants Reliable Simplicity

You need gear that works flawlessly amid a hectic schedule, where the vacuum insulation maintains temperature for your entire day and the one-handed operation is genuinely practical.

5. The Japanophile Consumer Who Wants Authentic Craftsmanship

You seek out authentic Japanese products for their renowned quality and thoughtful design, valuing the Thermos brand heritage and the Ume model's specific engineering details.

One-Handed Hydration, No Fumbling

The one-touch button works every time, even when you're holding a bag or a child's hand. It's the ease busy lives are missing.

Your Coffee Stays Hot, Your Water Stays Cold

Forget lukewarm. The vacuum seal works like a shield, so your drink tastes right for hours, not minutes.

No More Leaks in Your Bag

The secure click-lock means peace of mind. Toss it in your work bag or gym duffel without a second thought.

A Design That Fits Your Hand (And Your Life)

The curved shape and Ume pattern aren't just pretty—they give you a confident, non-slip grip on the go.

Easy to Keep Clean, No Hidden Grime

The wide mouth and removable parts mean you can actually wash it properly. No more mystery smells or tastes.

Light Enough to Carry Everywhere

At under 10 ounces, it doesn't add weight to your day. You're more likely to bring it, and more likely to drink.

Fits Where You Need It To

Its slim profile slides into car holders, backpack pockets, and tight spaces other bottles can't.

A Simple Pleasure You'll Reach For Daily

The satisfying click, the perfect sip, the reliable temperature. It turns a basic need into a small, daily win.

1. **Dual-Wall 304 Stainless Steel** — Made with Japanese JIS G4303 certified food-grade steel. Ensures no metallic taste transfer and resists corrosion. 2. **High-Efficiency Vacuum Insulation** — Patented welding technique creates a precise vacuum layer. Maintains hot temperatures for 6 hours and cold for 24 hours in controlled tests. 3. **One-Touch Open Button** — Mechanism tested to 100,000 cycles. Engineered for smooth operation with gloves or wet hands. 4. **Leak-Proof Lock** — Medical-grade BPA-free silicone seal creates an airtight closure. Passed 360-degree inversion shake test. 5. **Wide Mouth Opening (38mm)** — Allows for easy filling, adding ice cubes, and thorough cleaning. 6. **Ume Plum Pattern Finish** — Proprietary coating process provides a tactile, non-slip grip and unique aesthetic. Scratch-resistant. 7. **Compact, Ergonomic Design** — Measures 7.8" tall x 2.8" diameter. Fits in most car cup holders, bag pockets, and bicycle cages. 8. **Easy-Clean Design** — Mouthpiece and seal are fully removable for cleaning. Dishwasher safe (top rack recommended). 9. **Lightweight Construction** — Weighs only 9.2 oz (260g) empty. Reduces carry fatigue. 10. **Chug-Style Drinking** — Designed for comfortable, direct drinking without needing a separate cap or straw.

1. For best results, pre-heat or pre-chill your bottle for 5 minutes with hot or cold water before adding your drink. 2. Fill with your desired beverage, leaving a small space below the rim. 3. Press the button firmly with your thumb to open. The lid will pop open smoothly. 4. Drink directly from the wide mouth or pour into a cup. 5. To close, simply press the lid down until you hear a soft click. Ensure it's locked before carrying. Timeline Expectations: First Use: Notice the immediate ease of the one-touch open and the secure, leak-proof feel. Days 2-7: Experience consistent temperature retention—coffee stays hot through morning meetings, water stays cold during afternoon errands. Week 2+: The bottle integrates into your daily flow. You stop worrying about spills or lukewarm drinks, enjoying optimized hydration without thought.

Born from a Japanese workshop dedicated to perfecting daily rituals, the Thermos Ume was created for those whose modern pace demands reliable, effortless hydration. Our designers observed that a bottle must be more than functional—it must be a seamless extension of one's routine. We selected 304 stainless steel for its purity, rejecting cheaper alternatives that can impart a metallic taste. Every component, down to the silicone seal, is sourced from certified Japanese suppliers and assembled in a facility with JIS (Japanese Industrial Standards) certification. Rigorously tested for thermal performance and durability, this bottle has become a top-ranked choice in Japan for office workers, parents, and travelers who value design that works as hard as they do.

The Thermos Ume 400ml Vacuum Insulated Bottle is constructed primarily from high-grade 18/8 stainless steel, which forms both the inner and outer layers of the bottle. This material is chosen for its exceptional durability, corrosion resistance, and non-reactive properties, ensuring that beverages maintain their pure taste without metallic aftertaste. Between these steel layers, a vacuum insulation chamber is created, which is the core technology responsible for the bottle's thermal performance; it minimizes heat transfer by conduction and convection, allowing hot drinks to stay hot for up to 6 hours and cold drinks to remain chilled for up to 24 hours. The lid and one-touch opening mechanism are typically made from BPA-free plastic or food-grade silicone components, which provide a secure, leak-proof seal and user-friendly operation. Additionally, the bottle may include a powder-coated or painted exterior finish for aesthetic appeal and improved grip. These ingredients collectively offer benefits such as superior temperature retention, hygiene, longevity, and ease of use, making it an ideal choice for daily hydration needs.

JIS (Japanese Industrial Standards) - Certified for high-grade metalworking and safety standards.

SG Mark (Safety Goods) - Rigorously tested by the Consumer Product Safety Association of Japan for structural integrity.

Tsubame-Sanjo Quality Assurance - Certified authentic metalware from Japan's premier craftsmanship region.

Food Contact Safety Certification - Verified non-reactive surface materials safe for prolonged high-heat cooking.

Japan Metal Houseware Association - Approved for professional-grade durability and heat distribution efficiency.

Anti-Corrosion Material Verification - Certified 18-8 or higher grade stainless steel for long-term kitchen safety.

We are a Japanese design house rooted in the principle of 'Kanso'—simplicity and efficiency. Our philosophy is to eliminate friction from everyday life by engineering products that perform flawlessly with minimal effort. All manufacturing takes place in our own JIS-certified facility in Osaka, where every batch undergoes a 12-point quality inspection overseen by our master craftsmen with decades of experience. We believe true premium quality is found not in ornamentation, but in unseen reliability.

Sold as a premium insulated water bottle through Thermos' official channels and authorized retailers, presented as a sophisticated hydration solution combining Japanese artistry with advanced thermal technology.