The G Pen Slim is an incredibly slender and easy pen vaporizer that’s like a one hitter for wax. Turn this thing sideways and it almost disappears so it's awesome if you want something you can use to vape on the low without raising eyebrows. You can pick one up right now for less than $20 bucks here and if you enjoy wax and want an easy to use vape that’s low maintenance, jump on this. For the full G Pen Slim review, keep reading.

Quick Answer: 

The G Pen Slim is very inexpensive, works as a one hitter producing about 3 hits per bowl, features a single button start and it's very low maintenance. The vapor quality is decent and, for this price, you can't go wrong with this vape pen. 

g pen slim in black

G Pen Slim Key Features

The G Pen Slim has a few notable features that make it different from other over the counter vaporizers. Here they are:

  • Built for wax and works more like a dugout or one hitter for wax giving you about 3 hits per bowl

  • Ceramic atomizer - gives you a pure taste with your wax

  • Single charge lasts for a while. You can expect about 300 hits from a full charge.  

  • Instant heating so you can turn it on and start vaping right away

What's in The Kit

The G Slim kit is basic and easy just like the vaporizer itself. You’ll only need three items to begin using it (fortunately they're included):

  • G Slim

  • Wireless USB Charger

  • G Slim Tool (for easily loading your wax)

G Pen Slim Discretion

The G Pen Slim is very discreet from a size point of view. When G Pen named this the “slim” they weren’t joking.

It's about as thick as a number 2 pencil which gives you an idea of how easy it is to hide. I don’t like traveling with any pen vaporizers in my pockets since they have a habit of bending or breaking when you sit down.

However, if you have a jacket pocket or deep pockets on your pants you should be able to put it in without it breaking or bending. Alternatively, you could also get a lanyard and wear it around your neck - but that’s not discreet is it.

G Pen Slim Portability & Vaping Capabilities

The Slim’s built specifically for wax and you can fit only a small amount in each bowl making this a perfect little one hitter for you if you want to take a few hits either around the house or on the go.

The battery life was really good overall. It took be about 3 hours to fully charge the first time and then somewhere between 2-3 each consecutive time. From each charge you’ll get between 250-300 hits if I had to estimate. It lasted me about a week of using it often so, I don’t know the exact number but I got tons of hits.

G Pen Slim Battery Type & Quality

  • Battery Type: Lithium-ion
  • Charge Time: About 2-3 hours to charge
  • Charge Duration: Lasts for about 300 hits

Vapor Quality

The Slim’s vapor quality is great for the price and size. I found that drawing for at least 10 seconds gives you the best results and there's some visible vapor on the exhale. Here’s the thing though, if you’re looking for clouds, you won’t find them in a $20 vaporizer. This thing gets the job done, there’s good flavor and it reliably works.

However, the clouds are not there. You can get some visible vapor from big draws but don’t expect a whole lot. For me this isn’t a big deal because I care about the result more than the cloud and wasn’t expecting much from this unit. But if you are chasing clouds then you should know ahead of time that’s not what this is doing. If you can handle that, it's a great unit for the money.

Build Quality

There’s very few moving parts to the G Pen Slim. It has three pieces which are the battery, chamber and mouthpiece.

The chamber is replaceable and should last about 4-6 weeks for you on average. Of course if you're using wax that leaves residue you’ll shorten the lifespan of your chamber. Fortunately, they’re only about $9.95 a piece to replace and you shouldn’t have to do it often.

The outer casing of the Slim has a soft exterior that’s anti-reflective so it doesn’t draw attention. It also doesn’t heat up on the outside so you won’t have any problems holding it during your sessions.

The front has a single button to operate the pen making it as easy as it gets and overall the pen’s durable as long as you don’t accidentally put it in a shallow pocket and sit down.

How to use the G Pen Slim 

When you first get your pen, you’ll want to fully charge it (takes about 3 hours) and then run it through a few burn off cycles. Then, to use the G Pen Slim simply click the button on the front five times to turn it on. After you have it on, just press and hold the front button and begin vaping. I recommend you take longer draws to maximize your vapor production.


  • check
    Very affordable so anyone can have a wax vaporizer
  • check
    Durably built so you don't have to worry about it breaking easily
  • check
    Very small so its easy to hide and hold in your hand 
  • check
    Good battery life so you don't have to charge it more than once or twice a week if you use it often 
  • check
    Perfect bowl size for quick personal sessions 


  • Small tank can only fit a few hits worth of wax 
  • The heating chambers have to be  replaced 


Overall the G Pen Slim is a great wax vaporizer for the price. At the end of the day, it's not something I would rely on as a primary vaporizer for my wax but it is something I’d buy again if I wanted a cheap and simple vape pen that I wasn’t too worried about breaking or losing. You can’t expect life changing vapor from a pen that costs less than $20 but for the price, it's a great vaporizer for wax.

Where to Buy The G Pen Slim 

g pen slim in black

G Pen Slim $19.95

The G Pen Slim is a great and inexpensive portable wax vaporizer that's easy to use and produces good results. 

Alternatives to the G Pen Slim

For the price of the G Slim, there's not any quality alternatives I've found (yet). But if you're willing to come out of pocket and spend a little more money, there's some amazing vaporizers you can get. 

The Mighty is one of my favorite portable vaporizers. You get incredible vapor production, the batteries are replaceable, the battery life is great, and it works for both dry herb and concentrates. Overall, this is one of the best vaporizers available. 

Read the full review here

The Firefly 2 is the best vaporizer overall for flavor production. It has a glass vapor path that significantly cools down your vapor, great battery life, works for both dry herb and wax, and the taste from your material is out of this world. 

Read the full review here

The Pax 3 wins best battery life overall making this a great dual purpose vaporizer for anyone on the go. Its small and easily fits in the palm of your hand, gives you great vapor production, has outstanding battery life and features a durable aluminum casing. This is a great vaporizer for anyone who enjoys outdoor sports and discreet vaping with quality flavor. 

Read the full review here

The G Pen is a higher quality alternative to the G Slim (made by the same company) that's essentially a bigger version of the G Slim we just reviewed. It puts out slightly stronger vapor quality, has a great battery life, heats up quickly and gives you good flavor from your wax. If you like the G Slim but want something a little bigger for slightly more money, this is a good alternative. 

Read the full review here