VF1000ML Stainless Steel Vacuum Thermos Review

There’s nothing more frustrating than preparing a hot drink for a trip, only to find it lukewarm an hour later. A good thermos should retain heat, be durable, and remain leakproof, but finding the right one isn’t always easy.

When I got my hands on the ESBIT^® VF1000ML, I was initially surprised—ESBIT^® is best known for its solid fuel stoves and outdoor cooking gear. However, after testing this thermos extensively, I can confidently say it’s a worthy contender in the vacuum thermos market. Let’s dive into the details.

ESBIT^® is best known for its solid fuel stoves and outdoor cooking gear.

About ESBIT^®: From Fuel Stoves to Outdoor Gear

ESBIT^® was founded in 1949 in Hamburg, Germany, but its roots go back even further. In 1936, scientist Erich Schumm invented solid fuel tablets, revolutionizing outdoor cooking. Fast forward to 1949, and Fritz Paap officially founded ESBIT Compagnie GmbH, keeping the company within the family for generations.

While ESBIT^® initially specialized in portable fuel stoves, it has since expanded into a range of outdoor gear, including thermos bottles, cookware, and survival accessories. The brand has built a strong reputation for reliable performance, even in extreme conditions.

The ESBIT^® brand has built a strong reputation for reliable performance, even in extreme conditions.

First Impressions & Design

The VF1000ML thermos arrives in a sturdy cardboard box that clearly displays its dimensions (270mm × 90mm) and features. Unlike older thermoses that used glass insulation, this model features double-walled stainless steel with vacuum insulation, preventing heat transfer and ensuring long-lasting temperature retention.

What Stands Out?

• Matte black powder coating – A refreshing change from typical glossy or brushed stainless steel finishes.

• Textured surface – Provides a secure grip, even with wet gloves.

• Dual-lid system – Includes two caps:

• Push-button cap – Quick and easy to use.

• Screw cap – More secure for leak prevention.

• Integrated cups – The lid doubles as a drinking cup, with a second nested cup inside for sharing.

The aesthetic and practical design immediately impressed me. It looks rugged, feels well-built, and the extra cup is a thoughtful touch.

The aesthetic and practical design of ESBIT^® VF1000ML immediately impressed me. It looks rugged, feels well-built, and the extra cup is a thoughtful touch.

Performance & Heat Retention

A good thermos should retain temperature for extended periods, so I put the ESBIT^® VF1000ML to the test.

Understanding How It Works

A thermos retains heat by minimizing heat transfer via conduction, convection, and radiation. Since vacuum doesn’t conduct heat, and the inner walls are polished with silver coating, heat loss is significantly reduced.

The thermal efficiency of ESBIT^® VF1000ML is remarkable, exceeding my expectations.

Real-World Test

1️⃣ Pre-heating: Before adding tea, I filled the thermos with boiling water and let it sit for 5 minutes.
2️⃣ Filling & sealing: I poured out the water and replaced it with freshly brewed tea.
3️⃣ Field test:

• Outdoor temperature: -11°C (12°F)
• Storage: Inside my backpack (providing mild insulation)
• After 4 hours: Tea was still extremely hot—surprisingly even hotter than expected.
• After 6 hours: Still comfortably hot, even in freezing conditions.
• After 24 hours: ESBIT^® claims that at room temperature, liquids retain 60°C heat after 24 hours—and based on my test, I believe it!

The thermal efficiency is remarkable, exceeding my expectations.

One aspect that often gets overlooked is how easy a thermos is to handle in real-life conditions.

Handling & Practical Use

One aspect that often gets overlooked is how easy a thermos is to handle in real-life conditions.

• The powder-coated surface prevents slipping, making it easier to grip than standard stainless steel thermoses.
• Even with frozen hands and wet gloves, I could confidently open the thermos and pour without issue.
• The extra cup nested inside the lid is incredibly practical for sharing drinks.

One minor issue: I kept the thermos upright at all times because, while the screw cap is reliable, I generally don’t trust push-button caps for 100% leakproof performance.

The ESBIT^® VF1000ML is an exceptionally well-designed thermos, delivering outstanding heat retention, durability, and ease of use.

Final Verdict

The ESBIT^® VF1000ML is an exceptionally well-designed thermos, delivering outstanding heat retention, durability, and ease of use.

✅ Pros:

✔ Excellent insulation – Keeps liquids hot for over 24 hours.

✔ Durable stainless steel build – Scratch-resistant, impact-resistant.

✔ Non-slip powder-coated finish – Secure grip, even with wet gloves.

✔ Dual-lid system – Choose between push-button or screw cap.

✔ Extra integrated cup – Great for sharing drinks outdoors.

❌ Cons:

✖ Push-button cap isn’t ideal for leakproof storage – Best used in an upright position.

✖ Price is slightly higher, but worth it for the quality.

With a 1L capacity and premium materials, this thermos is an excellent investment for outdoor enthusiasts. Whether for hiking, camping, or everyday commuting, it provides reliable performance and ensures your drinks stay hot when you need them most.

Would I Recommend It?

Absolutely. If you’re looking for a high-quality thermos that combines top-tier insulation with thoughtful design, the ESBIT^® VF1000ML is a solid choice. Just be mindful of keeping it upright for maximum leak protection.