All Glass Vari-Flow Vape Cartridges I O2V-GCVF

starting at: $9.99

(29 customer reviews)


PLEASE NOTE: Orders of 50 or 100 will ship without O2VAPE branding. If you would like to order higher volumes, please call (855) 978-6518


Our new All Glass Vari-Flow Cartridges feature O2VAPE’s award winning ceramic cell technology in an all glass cartridge, for the ultimate in clean, metal free vaping. 

click here for our video tutorial on these cartridges unique filling method

We’ve taken the best vape cartridge in the world and made it even better! With the our new All Glass Vari-Flow Cartridges, your oil never comes in contact with any metal surfaces. The only metal present in the cartridge is in the 510 threads, which allows for the electrical conductivity that lets your battery power the internal heating coil and get to just the right temp. The consistency of the heating element means that you can use the same voltage that you would with our original ceramic cell carts.


This latest version of our best-selling All Glass Cartridge now features Vari-Flow technology, which allows you to adjust the air flow rate into the cartridge as you inhale to fine tune your perfect puff.


Take your flavor to the next level with a variable voltage vape and the all glass cartridge. We have tested extensive iterations and design elements with all glass cartridges, finding that they were effected by issues like increased leakage, fragile glass, or poor performance. By taking our testing to the limits we found a winning combination that provides those looking for an alternative to cartridges containing any metals with the highest quality option.  While we make sure that everything you find on this site passes rigorous heavy metals testing, we also understand the draw for a cart that is all glass, so without further ado, The O2VAPE All Glass Vari-Flow Cartridge.


As this is an all glass cart, there is still a need to be a little easier on it when filling and capping. No matter how tough we make them, a glass pole will always be more fragile than a metal pole. That said the trade off for an all glass option makes up for that.

Available in .5ml and 1ml sizes, making them fully compatible to be filled with oil straight from an applicator or vape filling machine.

For use with most 510 Thread Vape Pen Battery with 3.7 Volts or higher, including these best selling vape pens: may not fit on some drop down models

*Will not work with lower voltage batteries, such as our Original Buttonless Battery.


Get ready for the future of oil vape cartridges!  While everyone else has been catching up with the quality of our glass and ceramic vape cartridges, we have been continuing to perfect the puff with our cutting edge 510 thread ceramic vape cartridges.  That’s right, now you can continue using O2VAPE’s great vape products while going 100% glass and award winning wickless ceramic technology!


  • Internally heated ceramic element
  • Available in .5ml and 1ml sizes
  • Wickless and Coil-less design – your oil is heated directly from the ceramic element
  • For Aromatherapy purposes only

That means that you should screw this right on to the 510 thread of  our 3.7 volt button vape pen batteryVariable Voltage Pen, then go ahead and rip the cleanest and smoothest tasting hit that you have experienced to date!

You’ll realize that the upgraded filling method allows oil applicators to smoothly and easily fill without overflow or a sticky mess in the end.  The wide open mouth allows easy filling, even with the thickest oils.

If you are looking for a few cartridges for personal use you can go ahead and buy right now.  If you are looking for a larger number of cartridges for your business or brand we can also work with you in producing the most dependable logo vape cartridges.  Just contact us at our wholesale vape pen page.

For instructions and Pro Tips on filling these all glass carts, watch our full tutorial:


View Our Testing Results

Additional information


1 Cartridge, 2 Cartridges, 5 Cartridges, 10 Cartridges, 50 Cartridges, 100 Cartridges


.5ml (.5 gram), 1ml (1 gram)

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29 reviews for All Glass Vari-Flow Vape Cartridges I O2V-GCVF

  1. Alan C. (verified owner)

    Best you can buy, stop looking and buy these right now, they slap.

    • Dana E. Shoched

      Thank you Alan! They so good make ya want to slap your Grandma!

  2. Chris A (verified owner)

    These are really great cartridges.

  3. Allen W. (verified owner)

    I already loved the regular all-glass carts. The variable airflow version is a game changer for my D8 extract with 5% terpenes. It draws so easily and creates a lot of vapor and big hits. Get them, it’s a no brainer!!!

    • Dana E. Shoched

      Thank you Allen, glad they are working out so great for you !

  4. Anthony C (verified owner)

    Easily the best cartridges on the market. The all glass carts provide a smooth draw and with the adjustable air flow it makes it even better. The taste is much better than cotton wicks as well. All in all of you don’t have these you’re making a huge mistake.

    • Dana E. Shoched

      Thank you Anthony !

  5. Roger B. (verified owner)

    These carts give good, cool and reliable hits. Best choice of battery is the Vari-Vape 900.

  6. Marinos (verified owner)

    Best carts ever!! Smooth and tasty! Cant get any better than that!

    • Dana E. Shoched

      Thank you so much ! We love them too!

  7. Steve B. (verified owner)

    While I liked the original version, being able to adjust intake air flow makes this cart the best I’ve used. I’m also getting multiple refills per cart. Can’t beat that

    • Dana E. Shoched

      Thank you Steve! Yes, you can not go wrong with either one 🙂

  8. Brian B. (verified owner)

    I’ve had one, .5ml “test-subject” for two weeks now. It has been torture-tested with seven fills/refills in that time-frame, of custom blends of no less than a dozen different distillates, isolates, concentrates and live-resins/terpenes. I offered it no “priming the coil” or break-in period….just filled, vaped and repeated… easily vaped a path through everything I threw at it with ease… quickly switched flavors when I switched terps and without any previous terps residual funkiness.

    To say that I am beyond impressed, is an understatement. TEST = PASSED, and there can be only “One”…..this is IT.

    The all-glass Variflow cartridges, really are THE BEST you can get…..tops in all categories (flavor, reliability, adaptability, quality, ease of filling and use, blah, blah, blah). I will soon be after a stockpile of 1ml and .5ml

    • Dana E. Shoched

      WOW!!! Thanks Brian B. Welcome to the O2 family! Make sure you check out the wholesale discounted pricing on the wholesale tab.

  9. Antonio G. (verified owner)

    Best cart so far so good going too get a another one too thanks

    • Dana E. Shoched

      You are welcome Antonio~

  10. brian (verified owner)

    Simply great… no gooey mess halfway through. hits the same every time and easy to fill.

  11. Eric (verified owner)

    O2vape all glass carts are a game changer for people who are sensitive to metals and industrial oils. The cleanest vaping experience I’ve encountered. The vari-flow ability is really nice, an marked improvement over the prior model. Highly recommended.

  12. Kenneth B. (verified owner)

    Perfect for FSHO!

  13. Justin S. (verified owner)

    By far the best cartridges I’ve ever used. I got a bit forceful with the syringe tip while refilling one and broke the inner glass tube right off, but it was a good learning lesson. The durability is fine as long as you treat it with a little bit of care.

  14. Andy (verified owner)

    This product is absolutely amazing, the cartridge itself hits so clean and is honestly just visually satisfying to look at too. The only complaints I have is that because of the odd filling mechanic, a fine tip for your syringe is an ABSOLUTE must, unlike some others where you can get away without it. I wish the metal tip was included with this product, or at least an option to add it on for cheap. Also the cartridge is wider then standard so it doesn’t fit in all batteries that have a drop-in style.

    • Dana E. Shoched

      Thanks Andy! we are looking at adding a fill tip , also these cartridges will fit in our Patented FILP ULTRA 🙂

  15. BRIAN M. (verified owner)

    I have tested many different types of tanks and pods. All claiming to be “clog proof”, “Flavorful” etc. Sometimes these claims are backed up by the product. BUT most of them are short lived and at some point; either after a few fills or even just after time turn into frustration. Me, I smoke ALOT. I rely on my tanks AND batteries. I have filled this tank more than 10 times already, if not 15 times:D. Yes, it does require a bit of practice to be quick about filling it but that is because we are all trained on filling from top to bottom. This tank is just simply the opposite. I get a large, smooth and flavorful hit each and every time. Using the thickest oils are no trouble either. I can count on a perfect hit each time. This tank does seem to work best with a high voltage , push button battery though. I would not recommend using this tank with an “Auto-Draw” type battery because you loose flavor.

    • Dana E. Shoched

      Thank you Brian ! Interesting comment on the auto draw we have never heard that before maybe you need our auto draw battery 🙂 It does make a differnce if you have good battery as well!

  16. Izzy (verified owner)

    Absolutely amazing product. Great air flow good hits. This all glass pen makes for amazing look. Theirs with some solvent less products. And was simply blown away. Most definitely will only be buying these from now on!!

    • Dana E. Shoched

      Thank you so much! Welcome to the O2 family 🙂

  17. Mike S. (verified owner)


    • Dana E. Shoched

      Thank you Mike!

  18. Jake

    I have been looking for the perfect cart for my live rosin. It is flower press rosin and has problem logging every other cart I have tried. These glass carts are awesome! Not only that O2 customer service helped out when I couldn’t get the ceramic carts to work. Walked me through troubleshooting and suggested this all glass cart. It is a match made in heaven.

  19. Bryan (verified owner)

    Hands down the best cartridges I’ve ever used. No leaks. No clogging. Great clouds and air flow. Not the cheapest you will find, but in this case you definitely get what you pay for (and more). Very high quality and performance. These will be my absolute go-to carts moving forward.

    • Dana E. Shoched

      Thank you Bryan!

  20. corina1164 (verified owner)

    Everything great good products

  21. Craig D (verified owner)

    Won’t use nothing else,

    • Dana E. Shoched

      Thank you Craig!

  22. David T. (verified owner)

    Best quality cartridges I’ve ever used. So incredibly clean tasting. Definitely worth it!

    • Dana E. Shoched

      Thank you David!

  23. Eddie B (verified owner)

    Clean and smooth hits. Great product.

  24. Adam L. (verified owner)

    These cartridges are some great pieces of engineering, the variable flow rate is impeccable. One prior review mentioned that these give the cleanest, heaviest hits and that really is true. Only way to vape diamonds unless you’re using the Traveler Extreme MC dispo

    • Dana E. Shoched

      Thank you Adam !

  25. Matt (verified owner)

    Best cartridge on the market

    • Dana E. Shoched

      WOOT WOOT! Thank you Matt !

  26. Roman (verified owner)

    Best cart on the market.

  27. Mike (verified owner)

    Taste is beyond excellent nothing comes close to being so flavor full. However, after a refill I can’t get the heating part to screw on to the cart more than a quarter turn which leads to the cart leaking. Love the cart hate that I can’t screw the two parts together

    • Dana E. Shoched

      Hi Mike great ! Glad you like them they really are not ot be refilled but we do have people that will refill one or 2 times but that is not really recommended so not sure why you are having issues …We have a big sale at black Friday and jsut finished one maybe try some more 🙂

  28. Frank P. L. Jr (verified owner)


    You all know you’re badd! This cartridge is More Fire! Even with my high viscosity unadulterated rosin (pressed through 90μm first), this cartridge delivers from the press of the button. Med-Pass, Med-Pass, Med-Pass. Blessings O2VAPE, in Jesus’ name 🙏

  29. Shaq (verified owner)

    Oh my god
    Game changer
    ive been vaping oil for many many years and this is the best of the best la cream of the crop yall.

    • Dana E. Shoched

      WOW! Thank you so much ! Welcome to the family

    • Dana E. Shoched

      Wow Thank you !

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