Three devices. Three form factors. Three very different places in the 2026 U.S. vape market.
The RELX Infinity 2, Flum Pebble, and Geek Bar Pulse X are frequently compared to one another in search queries and retail conversations, but they aren’t actually competing on the same turf. The Infinity 2 is a closed pod system with replaceable cartridges. The Flum Pebble is an entry-tier rechargeable disposable. The Pulse X 25K is a high-capacity disposable with a smart display and dual-mode power output. They share a category — “devices someone might buy this week” — and almost nothing else.
That distinction matters, and it’s what most consumer-facing comparisons get wrong. This piece breaks down the specs, the real cost math, and the market signals each device represents for retailers, distributors, and informed buyers trying to understand where the 2026 category is going.
🎯 At a Glance: Which Category Does Each Device Really Compete In?
RELX Infinity 2 — Closed pod system. 440mAh rechargeable battery, three power modes, replaceable 1.9mL pods. Positioned against JUUL, Vuse Alto, and refillable pod starter kits. Lower per-session cost if you stick with the platform.
Flum Pebble — Entry-tier rechargeable disposable. 600mAh battery, 14mL reservoir, 6,000-puff claim. Positioned against other mid-range disposables in the $15–$20 price tier. Simple, proven, still one of the most-copied devices on shelves.
Geek Bar Pulse X 25K — High-capacity smart disposable. 820mAh battery, 18mL reservoir, 25,000-puff regular / 15,000-puff pulse mode, 3D curved display. Competes with Lost Mary Nera, NEXA Ultra, Fifty Bar, and the rest of the 25K+ premium disposable tier.
🔵 RELX Infinity 2
The RELX Infinity 2 occupies a category that most disposable-focused buyers rarely consider: the closed pod system. It uses replaceable 1.9mL pre-filled pods rather than a single-use reservoir, which fundamentally changes the ownership math. The device is a one-time purchase; pods are the recurring cost. Retail availability: the Infinity 2 is stocked through authorized U.S. channels including VapeOwls.
Key Specifications
| Device Type | Closed-system pod vape |
| Battery | 440mAh (14% larger than original Infinity) |
| Charging | USB-C, 80% in 15 minutes, full in ~27 minutes |
| Power Modes | Three: Eco (5.5W), Smooth (6.5W), Boost (8W) |
| Pod Capacity | 1.9mL per pod (~500 puffs per pod) |
| Pod Compatibility | RELX Pod, Pod Pro, Pod Pro 2 |
| Display | 4-bar LED battery indicator with dual-side LED |
| Dimensions | 112mm × 23mm × 10mm, ~25g with pod |
| Safety Features | Smart Pace vibration alert (15 puffs in 15 min); IP55 water resistance |
Market Signal
The Infinity 2’s ongoing presence in 2026 is itself a market signal. Pod systems were declared dead by most industry analysts once disposables dominated the category in 2022–2023. They weren’t. What RELX has done — along with JUUL and a small cohort of closed-system manufacturers — is preserve the refillable-platform model for consumers who prioritize lower long-term cost and device longevity over the simplicity of a throwaway. The Red Dot-award-winning design and the quiet ceramic-coil vapor output (reportedly under 10 decibels) matter to a specific buyer persona: professionals, frequent travelers, and adults who want discretion.
🔴 Flum Pebble (6000)
The Flum Pebble is arguably the most iconic mid-range disposable of the past three years. It helped establish the rechargeable-disposable category as a mainstream format and remains one of the most consistently stocked and most consistently counterfeited SKUs on U.S. shelves. Retail availability: authentic Flum Pebble units with verifiable security codes are available through authorized retailers including VapeOwls.
Key Specifications
| Device Type | Rechargeable disposable (not refillable) |
| Battery | 600mAh, USB-C rechargeable |
| E-Liquid Capacity | 14mL prefilled |
| Nicotine Strength | 5% (50mg/mL) nicotine salt |
| Puff Count (claimed) | ~6,000 puffs |
| Coil | Mesh coil |
| Activation | Draw-activated (no buttons) |
| Flavors | ~30+ flavors in the Pebble line (expanded to ~50+ historically including tobacco/menthol) |
| Safety Features | Short-circuit and over-charging protection |
Market Signal
The Pebble is the canonical example of the “approachable disposable” — big enough to last most users a week, small enough to pocket, simple enough to operate with zero learning curve. Its continued popularity in 2026 is a reminder that not every vaper wants 25K puffs, a touchscreen, and turbo mode. A significant share of the category prefers a proven, pocket-friendly form factor at a predictable price. Worth noting: the Pebble is one of the most-counterfeited disposables in the U.S., which makes sourcing through verified channels essential. See our counterpart piece on how to verify authentic Flum devices for the full breakdown.
📊 Side-by-Side Specification Comparison
| Specification | RELX Infinity 2 | Flum Pebble | Geek Bar Pulse X 25K |
|---|---|---|---|
| Category | Pod system | Disposable | Disposable |
| Battery | 440mAh | 600mAh | 820mAh |
| E-liquid / Pod | 1.9mL per pod | 14mL integrated | 18mL integrated |
| Puffs per unit | ~500 per pod | ~6,000 | ~25,000 / ~15,000 |
| Coil type | Ceramic | Mesh | Dual mesh |
| Display | 4-bar LED | None | 3D curved HD |
| Power modes | 3 (Eco/Smooth/Boost) | 1 (fixed) | 2 (Regular/Pulse) |
| Rechargeable | Yes (USB-C) | Yes (USB-C) | Yes (USB-C) |
| Refillable / replaceable | Replaceable pods | No (disposable) | No (disposable) |
💰 The Cost-Per-Puff Reality Check
Puff-count marketing obscures cost math. Here’s the actual per-puff economics using typical U.S. retail pricing as of Q2 2026:
| Device | Retail Price | Claimed Puffs | Cost Per Puff (claimed) | Cost Per Puff (realistic*) |
|---|---|---|---|---|
| RELX Infinity 2 (device + 3 pods) | ~$35 + $15/3-pack pods | 1,500 (3 pods) | $0.0233 | $0.027 |
| Flum Pebble | ~$15–$18 | 6,000 | $0.0025–$0.003 | $0.005 |
| Geek Bar Pulse X 25K | ~$17–$24 | 25,000 (regular) | $0.0007–$0.001 | $0.0014 |
🎯 Who Each Device Is Actually For
RELX Infinity 2 — The Long-Game User
Best for: adults who have already settled on a nicotine routine, want predictable monthly costs, prioritize discretion (the ceramic-coil vapor is famously quiet), and aren’t chasing high puff counts. Also the strongest candidate for travelers, given the IP55 water resistance and pod-replacement ecosystem.
Flum Pebble — The Approachable Buyer
Best for: adults who want a disposable that fits in a front pocket, delivers consistent mid-range performance, and doesn’t require learning a new interface. The Pebble’s simplicity is its competitive moat. No screen to glitch, no mode slider to accidentally switch, no turbo button to drain the battery faster than expected. It vapes, it charges, it runs out, you replace it.
Geek Bar Pulse X 25K — The Feature-Maximalist
Best for: adults who want the maximum capacity available in a single-device format, appreciate dual-mode operation (regular for longevity, pulse for flavor intensity), and want real-time feedback on puff count and battery. Also the best value for heavy vapers — a single device realistically lasts 3–5 weeks for most users, which is longer than a standard workweek-pay-cycle.
🏭 What These Three Devices Tell Us About the 2026 Market
This isn’t really a comparison — it’s a cross-section of where the U.S. disposable/pod category sits heading into Q3 2026:
For more on where the category is heading, see our 2026 Vape Market Playbook and “Built in USA” Compliance Analysis.
⚖️ A Note on Regulatory Status
As of April 2026, none of these three devices appear on the FDA’s list of 41 authorized ENDS products. The FDA’s current authorized list is dominated by tobacco- and menthol-flavored pods from NJOY, Vuse, Logic, and JUUL. RELX, Flum, and Geek Bar are manufactured under brand-level quality control, but all three are technically unauthorized for sale in the U.S. under PMTA rules — and in the 13 states operating vapor product directory laws (Alabama, Florida, Kentucky, Louisiana, Oklahoma, North Carolina, Virginia, Wisconsin, Tennessee, and others), retailers selling unlisted products face fines of $2,000 to $50,000 per violation.
This is the defining regulatory reality of the 2026 market: what consumers want to buy and what the FDA has authorized do not meaningfully overlap. How that gap closes — through expanded PMTA approvals, flavor restrictions, or continued enforcement escalation — will shape the next 12–24 months more than any product launch.
❓ Frequently Asked Questions
Which of these three devices has the best flavor output?
This is subjective and highly dependent on nicotine preference. The RELX Infinity 2’s ceramic coil delivers a smoother, more consistent throat hit with less vapor intensity — preferred by users transitioning from cigarettes. The Flum Pebble’s mesh coil produces moderate vapor with reliable flavor accuracy. The Geek Bar Pulse X’s dual mesh coil in Pulse mode produces the most intense vapor and flavor of the three, particularly in fruit and candy profiles. Reviewers consistently rank the Pulse X highest on pure flavor intensity; the Infinity 2 highest on consistency and smoothness.
How do the real-world puff counts compare to advertised numbers?
All three devices report puff counts based on machine-testing with short, fixed-volume draws. Real-world use typically delivers 50–65% of claimed puff count due to longer human inhalations and variable draw patterns. For the Pulse X 25K, that means expect ~12,000–16,000 actual puffs rather than 25,000. For the Flum Pebble, expect ~3,000–4,000 actual puffs from the claimed 6,000. RELX pods are the most consistent in real-world performance, typically delivering close to the claimed ~500 puffs per pod.
Is a pod system like the RELX Infinity 2 actually cheaper long-term than disposables?
For heavy daily users who stick with the platform, yes. A RELX Infinity 2 user consuming 1 pod every 1–2 days will spend approximately $35–$45 per month on pods after the initial $35 device purchase, versus $60–$80 per month replacing high-capacity disposables at the same usage rate. For light or occasional vapers, the math reverses — the device cost doesn’t amortize, and buying a single disposable every few weeks is cheaper. The breakeven point is typically 2–3 months of daily use.
Which device is most likely to be counterfeited?
The Geek Bar Pulse X has the highest absolute volume of counterfeits in U.S. retail because it’s one of the most-searched disposable brands in America. The Flum Pebble is also heavily counterfeited, particularly in gas stations and unlicensed smoke shops. The RELX Infinity 2 is less commonly counterfeited in the U.S. market because it’s a refillable platform — counterfeiters target high-volume single-use disposables where the unit economics favor fakes. All three brands operate verification systems (QR codes, scratch-off panels, security codes). See our full authentication guide for step-by-step verification instructions.
How should retailers think about stocking across these three categories?
The current retail conventional wisdom is to stock across tiers rather than concentrating in one. A typical U.S. vape retailer now carries: (1) one or two closed pod systems for platform-committed customers (RELX, JUUL, or Vuse), (2) 3–5 mid-range rechargeable disposables for the approachable segment (Flum Pebble, Lost Mary MT15000, NEXA Ultra), and (3) 5–10 high-capacity premium disposables for feature-maximalists (Geek Bar Pulse X, Lost Mary Nera, Fifty Bar). This tier-spread approach maximizes customer conversion but requires tighter inventory management. Compliance-conscious retailers should also maintain a clearly separated section of FDA-authorized products (NJOY, Vuse tobacco/menthol) to serve customers specifically asking for authorized options.
Why isn’t the Geek Bar Pulse (non-X) in this comparison?
The Pulse X 25K is the current flagship and has largely replaced the original Pulse in retail placement. The non-X Pulse (15K puffs, 650mAh, 16mL) remains available and is effectively a smaller-capacity version of the same platform — most of the analysis in this piece applies to both, with the Pulse being appropriately priced ~$3–$5 lower. For most buyers in 2026, the Pulse X is the better value per dollar.
What about the Flum Pebble X or newer Flum Mello 20K?
The Flum Pebble X and Mello 20K are newer entries in the Flum lineup that occupy the premium-disposable tier alongside the Pulse X. The original Pebble 6K was chosen for this comparison because it represents the entry-tier disposable format that the Pebble pioneered, and because it’s still one of the highest-volume SKUs in U.S. retail. A full comparison of the expanded Flum lineup (Mello, UT Bar, Pebble X) will follow in a separate piece later this quarter.
Are any of these three devices available in nicotine-free versions?
All three offer 0% nicotine options. RELX produces 0% Pod Pro 2 cartridges compatible with the Infinity 2 device. The Flum Pebble Zero is available in limited flavor rotations. The Geek Bar Pulse X is widely available in 0% nicotine across 12+ flavors from major U.S. retailers. The 0% category has grown considerably in 2025–2026 as some state flavor-ban laws treat nicotine-free products differently from nicotine-containing products.
🎯 The Bottom Line
The RELX Infinity 2, Flum Pebble, and Geek Bar Pulse X aren’t really competing against each other — they’re serving three different buyers who happen to be searching the same keywords. The Infinity 2 is the choice for platform-committed adults who want lower long-term cost and discretion. The Flum Pebble remains the approachable mid-tier disposable for users who want simplicity over specs. The Pulse X 25K is the feature-maximalist premium disposable that defined where the category went in 2025–2026.
For buyers: pick the form factor that matches your usage pattern first. Per-puff cost is secondary to whether the device matches how you actually vape.
For retailers and distributors: the real takeaway is that “disposable vs. pod” is no longer a meaningful category distinction. Consumers are comfortable with multiple form factors simultaneously, and inventory planning in 2026 means stocking across tiers rather than picking a side.
📚 Sources & Further Reading
Manufacturer Product Pages
- RELX — Official Infinity 2 product page
- Geek Bar — Official Pulse X product page
- Flum — Current lineup (Mello & UT Bar)
Industry Data & Reviews
- Vaping360 — Independent device reviews and puff-count testing methodology
- FDA Center for Tobacco Products — Authorized ENDS list and enforcement updates
- VapeTM — State vapor product directory tracker (13-state registry laws)
Retail & Distribution
- VapeOwls.com — Authorized U.S. retail platform for adult consumers
- VapeOwls — RELX Infinity 2 Device (6th Gen) product page
- VapeOwls — Flum Pebble Disposable Vape product page
- VapeOwls — Geek Bar Pulse X 25K product page
- VapeOwls editorial — ICEMAX vs. IceBomb vs. Flum Float X comparison
- VapeOwls editorial — How to spot a fake Geek Bar, Lost Mary, or FLUM
- B&J Wholesale — Licensed U.S. B2B distributor
