The Terra Incognita Bullet is an insulated stainless steel vacuum flask, offered in 500, 750, and 950 ml sizes, that keeps drinks hot or cold for up to 24 hours. Built from 100% food-grade 18/8 stainless steel with double-wall vacuum insulation, the 500 ml model weighs 370 g (13.1 oz) and packs down to a slim 70 mm diameter that slides easily into a pack or bottle pocket. It is a durable, everyday flask for the trail, the commute, and the campsite alike.
Terra Incognita is a European outdoor brand with more than 18 years of expedition experience and its own gear production, and the Bullet applies that expedition standard to a simple daily object. The aerodynamic profile is not just about looks - it makes the flask quick to grab and stow one-handed - while the leak-proof inner stopper and built-in insulated cup turn it into a self-contained hot-drink kit you can carry anywhere.
Who is the Bullet flask designed for?
The Bullet suits hikers, campers, commuters, and anyone who wants a hot or cold drink hours after leaving home. The 500 ml size is a natural solo companion for a day hike or the office, the 750 ml handles a long working day, and the 950 ml covers a shared pot of tea at camp. Its rugged steel build stands up to being dropped in a pack or tossed in a truck bed.
What is the Bullet flask made of?
The flask is made entirely from 100% food-grade 18/8 stainless steel, the 18% chromium and 8% nickel grade valued for corrosion resistance and a clean, taste-neutral surface. Two steel walls with a vacuum drawn between them block conductive and convective heat loss, which is how the Bullet holds temperature for 24 hours. The same steel makes it impact-resistant, so dents and drops do not compromise the seal.
How does the Bullet flask perform day to day?
The threaded inner stopper is the detail that sets it apart: loosen it slightly and you can pour a drink through the flow channel without ever fully opening the flask, which keeps the insulated air seal intact and prevents spills in a bag. The included cup twists onto the top for storage and lifts off as an insulated mug, so you get a complete drinking setup in one piece of gear.
Specifications
| Characteristic | Bullet 500 | Bullet 750 | Bullet 950 |
|---|---|---|---|
| Weight (EU) | 370 g | 490 g | 570 g |
| Weight (US) | 13.1 oz | 17.3 oz | 20.1 oz |
| Packed Size (EU) | ∅70 × 254 mm | ∅83 × 297 mm | ∅83 × 332 mm |
| Packed Size (US) | ∅2.8 × 10.0 in | ∅3.3 × 11.7 in | ∅3.3 × 13.1 in |
| Capacity (EU) | 500 ml | 750 ml | 950 ml |
| Capacity (US) | 16.9 fl oz | 25.4 fl oz | 32.1 fl oz |
| Materials | 100% Food-grade 18/8 Stainless Steel | ||
| Insulation Type | Vacuum Insulation | ||
| Temperature Retention | 24 Hours (Hot/Cold) | ||
| Stopper Type | Threaded Leak-proof Stopper (Pour-through) | ||
| Best Use | Hiking, Camping, Expeditions, Daily Use | ||
| Product Type | Thermos | ||
Key features
- 24-hour temperature hold - double-wall vacuum insulation keeps drinks hot or cold for a full day, so morning coffee is still warm at dusk.
- Food-grade 18/8 stainless steel - the impact-resistant, rust-proof interior will not hold flavors or leach taste into your drink.
- Leak-proof threaded inner stopper - unscrew it a half-turn to pour without removing the whole cap, so nothing spills in your bag.
- Built-in insulated cup - the twist-off top doubles as a thermal cup that shields hands and lips from a scalding pour.
- Slim aerodynamic shape - the 70 mm (2.8 in) diameter body slides smoothly into bottle pockets and pulls out one-handed.
- Packable 370 g weight - the 500 ml model carries at just 13.1 oz, light enough for daily trail and commute use.
- Three capacities - choose 500, 750, or 950 ml to match a solo coffee run, a full workday, or a shared campsite brew.
Who makes it
Terra Incognita has spent more than 18 years running trips and expeditions and manufacturing its own outdoor gear, so this model comes off the brand's own production line rather than a rebadged catalog. Every item carries a 12-month manufacturer warranty, and the design is tested in the field by the people who guide the trips.
Bullet FAQ
How long does the flask keep drinks hot or cold?
The Bullet keeps drinks hot or cold for up to 24 hours thanks to its double-wall vacuum insulation. Coffee poured in the morning stays warm into the evening, and cold drinks resist warming through a full day outdoors.
What sizes does the flask come in?
It comes in three capacities: 500 ml (16.9 fl oz), 750 ml, and 950 ml. The 500 ml suits solo daily use, the 750 ml covers a full workday, and the 950 ml is best for sharing a hot drink at camp.
What is the flask made of?
It is made from 100% food-grade 18/8 stainless steel, a corrosion-resistant grade that will not rust or hold flavors. The impact-resistant steel construction shrugs off drops, and the taste-neutral interior keeps drinks clean-tasting.
Is the vacuum flask leak-proof?
Yes. A leak-proof threaded inner stopper seals the flask and even lets you pour without fully removing the cap, so it will not spill inside a pack. The insulated cup twists securely onto the top for transport.
How much does the flask weigh?
The 500 ml model weighs 370 g (13.1 oz) and packs to a 70 mm (2.8 in) diameter by 254 mm tall. That slim profile fits standard bottle pockets and pulls out one-handed while staying light enough for daily carry.
Related gear
See more in Kitchen & Utensils, Thermoses & Mugs, Base Camp Status chair, Steel Bol 500.
The Terra Incognita Bullet is an insulated stainless steel vacuum flask, offered in 500, 750, and 950 ml sizes, that keeps drinks hot or cold for up to 24 hours. Built from 100% food-grade 18/8 stainless steel with double-wall vacuum insulation, the 500 ml model weighs 370 g (13.1 oz) and packs down to a slim 70 mm diameter that slides easily into a pack or bottle pocket. It is a durable, everyday flask for the trail, the commute, and the campsite alike.
Terra Incognita is a European outdoor brand with more than 18 years of expedition experience and its own gear production, and the Bullet applies that expedition standard to a simple daily object. The aerodynamic profile is not just about looks - it makes the flask quick to grab and stow one-handed - while the leak-proof inner stopper and built-in insulated cup turn it into a self-contained hot-drink kit you can carry anywhere.
Who is the Bullet flask designed for?
The Bullet suits hikers, campers, commuters, and anyone who wants a hot or cold drink hours after leaving home. The 500 ml size is a natural solo companion for a day hike or the office, the 750 ml handles a long working day, and the 950 ml covers a shared pot of tea at camp. Its rugged steel build stands up to being dropped in a pack or tossed in a truck bed.
What is the Bullet flask made of?
The flask is made entirely from 100% food-grade 18/8 stainless steel, the 18% chromium and 8% nickel grade valued for corrosion resistance and a clean, taste-neutral surface. Two steel walls with a vacuum drawn between them block conductive and convective heat loss, which is how the Bullet holds temperature for 24 hours. The same steel makes it impact-resistant, so dents and drops do not compromise the seal.
How does the Bullet flask perform day to day?
The threaded inner stopper is the detail that sets it apart: loosen it slightly and you can pour a drink through the flow channel without ever fully opening the flask, which keeps the insulated air seal intact and prevents spills in a bag. The included cup twists onto the top for storage and lifts off as an insulated mug, so you get a complete drinking setup in one piece of gear.
Specifications
| Characteristic | Bullet 500 | Bullet 750 | Bullet 950 |
|---|---|---|---|
| Weight (EU) | 370 g | 490 g | 570 g |
| Weight (US) | 13.1 oz | 17.3 oz | 20.1 oz |
| Packed Size (EU) | ∅70 × 254 mm | ∅83 × 297 mm | ∅83 × 332 mm |
| Packed Size (US) | ∅2.8 × 10.0 in | ∅3.3 × 11.7 in | ∅3.3 × 13.1 in |
| Capacity (EU) | 500 ml | 750 ml | 950 ml |
| Capacity (US) | 16.9 fl oz | 25.4 fl oz | 32.1 fl oz |
| Materials | 100% Food-grade 18/8 Stainless Steel | ||
| Insulation Type | Vacuum Insulation | ||
| Temperature Retention | 24 Hours (Hot/Cold) | ||
| Stopper Type | Threaded Leak-proof Stopper (Pour-through) | ||
| Best Use | Hiking, Camping, Expeditions, Daily Use | ||
| Product Type | Thermos | ||
Key features
- 24-hour temperature hold - double-wall vacuum insulation keeps drinks hot or cold for a full day, so morning coffee is still warm at dusk.
- Food-grade 18/8 stainless steel - the impact-resistant, rust-proof interior will not hold flavors or leach taste into your drink.
- Leak-proof threaded inner stopper - unscrew it a half-turn to pour without removing the whole cap, so nothing spills in your bag.
- Built-in insulated cup - the twist-off top doubles as a thermal cup that shields hands and lips from a scalding pour.
- Slim aerodynamic shape - the 70 mm (2.8 in) diameter body slides smoothly into bottle pockets and pulls out one-handed.
- Packable 370 g weight - the 500 ml model carries at just 13.1 oz, light enough for daily trail and commute use.
- Three capacities - choose 500, 750, or 950 ml to match a solo coffee run, a full workday, or a shared campsite brew.
Who makes it
Terra Incognita has spent more than 18 years running trips and expeditions and manufacturing its own outdoor gear, so this model comes off the brand's own production line rather than a rebadged catalog. Every item carries a 12-month manufacturer warranty, and the design is tested in the field by the people who guide the trips.
Bullet FAQ
How long does the flask keep drinks hot or cold?
The Bullet keeps drinks hot or cold for up to 24 hours thanks to its double-wall vacuum insulation. Coffee poured in the morning stays warm into the evening, and cold drinks resist warming through a full day outdoors.
What sizes does the flask come in?
It comes in three capacities: 500 ml (16.9 fl oz), 750 ml, and 950 ml. The 500 ml suits solo daily use, the 750 ml covers a full workday, and the 950 ml is best for sharing a hot drink at camp.
What is the flask made of?
It is made from 100% food-grade 18/8 stainless steel, a corrosion-resistant grade that will not rust or hold flavors. The impact-resistant steel construction shrugs off drops, and the taste-neutral interior keeps drinks clean-tasting.
Is the vacuum flask leak-proof?
Yes. A leak-proof threaded inner stopper seals the flask and even lets you pour without fully removing the cap, so it will not spill inside a pack. The insulated cup twists securely onto the top for transport.
How much does the flask weigh?
The 500 ml model weighs 370 g (13.1 oz) and packs to a 70 mm (2.8 in) diameter by 254 mm tall. That slim profile fits standard bottle pockets and pulls out one-handed while staying light enough for daily carry.
Related gear
See more in Kitchen & Utensils, Thermoses & Mugs, Base Camp Status chair, Steel Bol 500.
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