Walk into any vape shop — including our digital shelves at VapeOwls — and you’ll see three names come up in almost every customer conversation: RELX Infinity 2, Flum Pebble, and Geek Bar Pulse X. They look different, feel different, and serve different vapers — but they get compared to each other constantly.
Here’s the truth: there’s no single “best” option. There’s a best option for you. This buying guide walks you through each device, shows you exactly who it’s built for, and helps you pick the one that actually fits your vape style, your budget, and how often you vape.
⚡ The 60-Second Pick
In a hurry? Here’s the short version (click any device to shop direct):
🔵 RELX Infinity 2 — The Premium Pod System
Device: ~$35 · Pods: ~$15 / 3-pack
The RELX Infinity 2 is the only device in this comparison that isn’t a disposable. It’s a reusable pod system — you buy the device once, then replace the small 1.9mL pre-filled pods as you go. Think of it as the coffee-machine-and-capsules model of vaping: higher upfront cost, much lower ongoing cost.
RELX built the Infinity line for adults who want a quiet, discreet vape with premium flavor consistency. The ceramic-coil pods deliver under 10 decibels of noise (almost completely silent), and the device won the Red Dot design award for its slim aluminum build.
Battery
Per Pod
Puffs/Pod
Power Modes
Fast Charge
Water Resist.
✅ Pros
- Lower cost over 3+ months of use
- Whisper-quiet vapor (under 10 dB)
- Three power modes for customization
- Leak-resistant magnetic pod system
- IP55 water resistance
- USB-C fast charging (80% in 15 min)
❌ Cons
- ~$35 upfront cost vs. $15–$20 disposables
- Limited flavor selection vs. disposables
- Pods only — can’t refill with your own juice
- Lower puff count per pod (~500)
- Smaller battery than premium disposables
🔴 Flum Pebble — The Reliable Everyday Disposable
$15–$18 per device
The Flum Pebble is one of the most iconic disposables on the U.S. market. It launched the “pebble-shaped” form factor that you now see copied by a dozen brands, and it’s still one of the most-requested devices in our store. Why? Because it just works.
You get 14mL of prefilled e-liquid, a 600mAh rechargeable battery, a mesh coil, and ~6,000 puffs — no modes, no screens, no learning curve. Draw-activated, pocket-friendly, and straightforward.
Battery
E-Liquid
Puffs
Nic Salt
Coil
Charging
✅ Pros
- Simple — no modes, no screen to glitch
- Sleek pebble shape fits any pocket
- 30+ tried-and-true flavors
- Mesh coil delivers smooth, consistent vapor
- Affordable price point ($15–$18)
- Draw-activated — no buttons
❌ Cons
- Shorter lifespan than 25K+ devices
- No display to track battery or e-liquid
- One of the most counterfeited vapes in the U.S.
- No power modes — what you get is what you get
- Not as feature-rich as premium disposables
Update: there is now a Pulse X2 50K
Since this comparison was written, Geek Bar released the Pulse X2 50K — written Pulse X 2 on the box. It is the direct successor to the Pulse X in this article: 50,000 rated puffs instead of 25,000, a 0.6ohm dual mesh coil, and adjustable airflow, at $22.99 against $19.99. On running cost that is roughly 46¢ per 1,000 puffs versus about 80¢ for the Pulse X. The Pulse X still wins on flavor choice — 40+ options against 18 — so if the profile you want only exists there, stay with it. Everything below about the Pulse X still applies to the X2 in feel and draw.
📊 Head-to-Head: All Three at a Glance
| Feature | 🔵 RELX Infinity 2 | 🔴 Flum Pebble | 🟠 Geek Bar Pulse X |
|---|---|---|---|
| Type | Pod system | Disposable | Disposable |
| Battery | 440mAh | 600mAh | 820mAh |
| E-liquid | 1.9mL pods | 14mL | 18mL |
| Puff count | ~500 / pod | ~6,000 | ~25,000 |
| Display | LED bars | None | 3D curved HD |
| Modes | 3 (Eco/Smooth/Boost) | 1 | 2 (Reg/Pulse) |
| Lifespan (daily user) | Years (device) + pods | ~1 week | 3–5 weeks |
| Initial cost | ~$35 | $15–$18 | $17–$24 |
| Best for | Long-term use | Simplicity | Max capacity |
🎯 Which One Matches Your Vape Style?
Pick the persona below that sounds most like you — then scroll to our recommendation.
☕ The Daily Driver
You vape regularly throughout the day — a meaningful part of your routine. You care about cost because it adds up over months.
🎒 The Occasional Vaper
You vape a few times a day or just when you’re out. You don’t want a big device, don’t want a screen, don’t want to think about it.
💼 The Professional
Discretion matters. You don’t want loud vapor or chunky devices in your jacket pocket. You want quality without drawing attention.
🎪 The Flavor Chaser
Flavor intensity is everything. You want bold, high-vapor hits with 30+ flavor options to rotate through.
💰 The Budget-Conscious Buyer
You don’t want to spend more than $20 in one shot and need a device that lasts as long as possible for that money.
🏃 The Traveler
You’re on the move — flights, hotels, road trips. You need something that charges fast, doesn’t leak in a bag, and won’t drain on you.
❓ Frequently Asked Questions
Which of these three devices lasts the longest?
The Geek Bar Pulse X 25K by a wide margin. In regular mode, most vapers get 3–5 weeks from a single device. The Flum Pebble typically lasts about a week of moderate use. The RELX Infinity 2 is different — the device itself lasts for years, but each pod only delivers about 500 puffs, so you’ll replace pods every 1–2 days of steady use.
Which one has the best flavor?
“Best” depends on what you mean. For pure flavor intensity and vapor production, the Geek Bar Pulse X in Pulse mode wins — dual mesh coils hit hard. For smooth, consistent, ceramic-coil flavor that’s easy on the throat, the RELX Infinity 2 is the pick. The Flum Pebble sits in the middle with its single mesh coil — reliable and pleasant without being bold.
Are any of these rechargeable?
All three are USB-C rechargeable. The RELX Infinity 2 charges the device itself (pods are pre-filled and not rechargeable on their own). The Flum Pebble and Geek Bar Pulse X both charge the integrated battery inside the disposable. The Pulse X charges fastest at 80% in 20 minutes; the Infinity 2 hits 80% in 15 minutes.
Is the RELX Infinity 2 actually cheaper long-term than disposables?
For daily vapers, yes — after about 2–3 months of steady use, the Infinity 2 becomes cheaper than replacing high-capacity disposables. A daily vaper typically spends $35–$45/month on pods vs. $60–$80/month on premium disposables. For occasional vapers, disposables are cheaper because the device cost doesn’t amortize.
Can I refill any of these with my own e-liquid?
No. All three are closed systems. The RELX Infinity 2 uses pre-filled RELX Pod Pro 2 cartridges that can’t be refilled. The Flum Pebble and Geek Bar Pulse X are sealed disposables. If you want a refillable device, you’d need a different category — open pod systems or tank mods.
What nicotine strengths are available?
Both the Flum Pebble and Geek Bar Pulse X are sold at 5% (50mg/mL) nicotine salt, with 0% nicotine versions of the Pulse X also available. RELX Pod Pro 2 cartridges come in multiple strengths including 0%, 1.8%, 3%, and 5% — giving you the most flexibility across the three platforms.
Do these come in tobacco or menthol flavors?
Yes, all three offer tobacco and menthol options. The RELX Infinity 2 has classic tobacco and menthol pods. The Flum Pebble has a dedicated tobacco and menthol flavor lineup (Pebble Tobacco and Pebble Menthol). The Geek Bar Pulse X has multiple menthol/ice variants and tobacco-style flavor options.
Are any of these FDA-authorized?
No — none of these three devices are on the FDA’s list of 41 authorized ENDS products (that list is dominated by NJOY, Vuse, Logic, and JUUL tobacco/menthol pods). However, all three are manufactured under brand-level quality control. At VapeOwls, we only stock authentic product from authorized distribution channels — which is what matters most for consumer safety regardless of FDA authorization status.
What’s the best for someone quitting cigarettes?
Many former smokers find the RELX Infinity 2 easiest to transition to because the smooth ceramic-coil vapor and 1.8%/3% nicotine options closely mimic the cigarette experience without overwhelming throat hit. The Flum Pebble at 5% is a solid option for heavier smokers. The Geek Bar Pulse X 5% is more vapor-forward and may be too intense for first-time switchers. Consult a healthcare provider for personalized cessation guidance.
Do all three come with a warranty?
Manufacturer warranty policies vary. At VapeOwls, we offer a 5-day return window for defective sealed products. Defective disposables like the Pebble and Pulse X are eligible for refund or store credit (not replacement). The RELX Infinity 2 device carries a limited manufacturer warranty on hardware defects. See our full returns and warranty policy for details.
🦉 Ready to Find Your Match?
All three devices — RELX Infinity 2, Flum Pebble, and Geek Bar Pulse X 25K — are in stock at VapeOwls with verified security codes, fast U.S. shipping, and our authenticity guarantee. Click your pick below to shop direct:
📚 Keep Reading on VapeOwls
- How to Spot a Fake Geek Bar, Lost Mary, or FLUM in 2026 — Verification Guide
- ICEMAX 12K vs. IceBomb Bundle vs. Flum Float X 10K — Full Comparison & Review
- Shop the RELX Infinity 2 Device (6th Gen)
- Shop the Flum Pebble Disposable Vape
- Shop the Geek Bar Pulse X 25K Disposable
- Browse All Authentic Disposable Vapes
- About VapeOwls — Why Authenticity Matters
External Resources
- RELX — Official product pages & pod compatibility guide
- Geek Bar — Official verification and product info
- Flum — Official product lineup
- VapeTrends360 Industry Analysis — Market insights on all three devices
- VapeOwls — Licensed U.S. distributor (for retailers & businesses)
Editorial note: Vape products are intended only for adults of legal smoking age (21+ in the U.S.). Not recommended for non-smokers, youth, pregnant or breastfeeding women, or individuals with health conditions. Nicotine is an addictive chemical. Please use responsibly. By purchasing from VapeOwls, you confirm you are of legal age and understand the risks associated with vaping. Pricing shown is typical U.S. retail as of Q2 2026 and subject to change.