The Boundless Voyage Titanium Mug with Lid (Ti3025D) is a 420 ml single-wall titanium mug that doubles as a minimalist pot: boil water in it on the stove, then drink from it. It weighed 87 g with its lid on our scale, and a small gas canister fits inside. I paid $26 for it.
What You’re Getting
A 420 ml mug made from a single layer of 99.8% pure TA1 titanium, 85 mm across and 87 mm high, with “Boundless Voyage 420ML Titanium” laser-marked on the side. Two wire butterfly handles fold flat against the body, and a fitted titanium lid with a small lifting tab keeps heat in and debris out. It comes in a mesh bag and weighed 87 g with the lid on our scale.
What we like
- Goes straight on the stove
- 87 g with the lid
- A 110 g gas canister fits inside
- Handles fold flat
- Lid keeps heat in and bugs out
- No metal taste
What we don’t
- Too hot to sip straight away
- Drinks cool down quickly
- Usable capacity is 350–380 ml
Quick Specs
| Spec | Details |
|---|---|
| Brand | Boundless Voyage |
| Model | Ti3025D |
| Capacity | 420 ml350–380 ml usable |
| Material | TA1 titaniumSingle wall |
| Colour | Titanium |
| Weight | 87 gwith lid |
| Size | Ø 8.5 × 8.7 cm |
| Included | LidMesh bag |
A mug and a pot
Because it’s single-walled, the mug goes straight on a camp stove. For a solo trip that means no separate pot: boil water for a coffee or a dehydrated meal in it, then drink or eat from it. The thin titanium heats quickly, and with the lid on the water boils fast. Titanium doesn’t rust or leach anything, so coffee, tea and soup taste as they should, with no metallic taint.
It’s also a good cup to brew into. We pull espresso straight into it with our portable espresso machine.
Hot to hold
The flip side of a single wall is heat. The whole body of the mug gets intensely hot the moment boiling water goes in, so hold it by the handles and wait a few minutes before you sip from the rim, or you’ll burn your lips. Drinks also cool down quickly compared with a double-walled mug, though the lid helps.
And 420 ml is the brim-full figure. When you’re boiling water or carrying a full mug around camp, about 350 to 380 ml is what you can safely fill it to without spilling.
Packing it
This is where the mug shines. The butterfly handles fold flat against the body, and a standard 110 g backpacking gas canister fits inside, so the mug and your fuel take up the space of one. It comes with a mesh bag.
Titanium mug comparison
We’ve tested several titanium mugs and cups. The 450 ml Boundless Voyage cup with lid is almost the same weight and holds a little more, but its lid can leak when it’s full. The 250 ml mug is lighter but small, and the Ti Artisan nestable cup comes in four sizes that stack inside each other.
This review 420ml Mug |  250ML Mug |  450ml Cup |  Ti Artisan Cup | |
|---|---|---|---|---|
| Lid | Yes | Yes | Yes | Yes |
| Model | Ti3025D | Ti3051D | Ti3026D | HR-Ta8307-450 |
| Size | 85 × 87 mm | 84 × 87 mm | 90 × 92 mm | 86 × 97 mm |
| Capacity | 420 ml | 250 ml | 450 ml | 450 ml |
| Weight | 87 g | 70 g | 85 g | 92 g |
| Price paid | $26 | $26 | $24 | $30 |
| Our score | 9.2 | 9.1 | 8.9 | 9.1 |
Conclusion: Boundless Voyage Titanium Mug with Lid (420ml)Conclusion
The Boundless Voyage 420 ml titanium mug is a mug and a pot in one: a single titanium wall that goes straight on the stove and boils water fast with the lid on. It weighed 87 g with the lid on our scale, the handles fold flat and a 110 g gas canister fits inside. It’s too hot to sip from straight after boiling, drinks cool quickly, and 350 to 380 ml is the practical fill, but it’s all the pot a solo camper needs. I paid $26.
A 420 ml single-wall titanium mug with a lid and folding handles that weighed 87 g on our scale.
It boils water on the stove and a gas canister fits inside, but it's too hot to sip straight away.
- Hikers
- Solo trips
- Campers
Yes. I paid $26 for a mug that's also a pot, and with a gas canister inside it takes up almost no room.
