The Boundless Terp Pen II is a breath-activated concentrate vaporizer with no buttons at all. Pull the magnetic cap, touch the exposed coil to your concentrate, and inhale — that is the entire operation. Built from 100% medical-grade stainless steel, it ships with a ceramic coil, a spare, and a USB-C cable. $31.95.
No buttons, and that is the design
Every other pen in this bracket asks you to learn something: hold for three seconds, click five times to change temperature, watch for a light. The Terp Pen removes all of it. Inhaling turns it on, stopping turns it off.
Instant heat-up means there is no waiting either. The practical result is a device you can use one-handed without looking at it, which is the actual reason people carry a pen instead of a rig.
The coil-to-concentrate method
Most concentrate pens want you to load a chamber, which means a dab tool, a surface, and a mess. The Terp Pen inverts it: the coil is exposed under the magnetic cap, so you dip the pen into the concentrate rather than loading the concentrate into the pen.
That makes dosing visual — you take what you touch — and it means there is no chamber to scrape out. It also means the coil is a consumable rather than a permanent part, which is why a spare is in the box.
Coils are the running cost
A ceramic coil is fitted and a backup ceramic coil is included, so the first replacement is already paid for. After that, coils are the ongoing expense on this device and the thing that determines whether it keeps performing.
Boundless sells ceramic coils in five-packs and a quartz coil five-pack as an alternative — quartz heats faster and reads cleaner in flavour, ceramic holds heat more evenly. Both fit. Cleaning or changing the coil regularly is what keeps the pen working, and the unit carries a 90-day limited warranty.
Specs
- Type: Concentrate vaporizer (dab pen)
- Activation: Breath-activated, no buttons
- Heat-up: Instant
- Body: 100% medical-grade stainless steel
- Cap: Magnetic
- Power: Electric — no butane
- Included: Ceramic coil, backup ceramic coil, USB-C cable
- Coil options: Ceramic or quartz
- Colourways: Black, Magenta, Stainless Steel, Lemon Yellow
- Warranty: 90-day limited
- Price: $31.95
What it is not
This is a concentrate device only. It does not take dry herb, and treating it as a dual-purpose pen is the most common mistake made about it.
If dry herb is what you want, Boundless' own Vexil is the herb vaporizer in the same catalog. For concentrates with more control and a glass path, the Dr. Dabber XS portable e-rig steps up to a real chamber and preset temperatures, and G Pen's Micro+ is the closest button-operated alternative at a similar size.