Trustworthy source for high quality vape hardware. Very pleased with the quality of product this company produces. You can just tell the product people are quite deliberate about the engineering and aesthetic choices that go into the production and sale of their hardware. There are so many companies producing this kind of hardware that DO NOT care about the quality or safety of their products - I purchased from several of them before I found O2 - and there is a world of difference here. Some examples of why I think they make GOOD STUFF: - Tasty carts. Everything I vape through their cartridges (both full-ceramic and non) tastes like... the thing I'm vaping through it, and nothing else! No metallic taste, no "dry hit" taste. Of course this depends on the thing vaped through it, and O2 can't control that, but what they can control for, they do. - Reusable carts. You get what you pay for. I have refilled my O2 carts several times before they start to get "stale." I have experience re-using carts from other brands like Delta Ape, and CBD is Better. No knock on those folks, they make fine disposables, IMO. But this product is superior for the environment relative to those, and in the long run, is actually cheaper per use, because you get more uses out of it. Of course this also depends on your usage habits and what you vape through them, so YMMV. - Well constructed carts. You can just tell by looking at and touching the carts that they are well-constructed. The silicon seals are of good quality. The glass is ground so as not to have any sharp edges. The carb on the airflow-adjustable carts actually works well. All of these things indicate attention to detail, and good design to me. - Stylish, discreet, and reliable, variable voltage batteries (I got two Nano's and two Lil' Bitty's). The "user interface" on these is as simple as it needs to be, and no simpler. They're efficient, no-nonsense devices compatible with a wide range of carts. AND, they're serviceable (of course you need to know what you're doing regarding circuits and batteries).

They are a great company They are a great company. I have order twice from them and they shipped my items out very fast. I had a problem with my second order but they answered back to my email in less the an hour. They also fixed my order and they also let me keep the wrong items I got from them. Best company to buy cartridges With out a doubt.

stopped working after 45 days. stopped working after 45 days. After reading other reviews, I will not be asking for an replacement, I've already thrown it in the trash. Just a waist of your hard earned dollars.

Only vape products I trust Only vape products I trust. Fast shipping and good customer service. My Flip Ultra has been with me for years and the all glass vape cartridges are by far the best on the market.

I had a complaint about the pens coming… I had a complaint about the pens coming broken …. They sent me 4 new pens within 3 days ! I appreciate the fast service and that my concerns were actually listen too ! Thanks May ! So happy with this company !