Vaping & Smoking devices
The uGo VII 950mAh vape pen is standard 5/10 thread, and fixed voltage. It is not suitable if you need to use lower voltages, but for that use, you can get the Brass Knuckles battery. Charging may be more convenient with the uGo, because it uses a standard micro-USB cable that most android phones use, whereas the Brass Knuckles pen uses a USB adapter that fits into a computer or USB charging block.
The Yocan Evolve-D dry-herb vaporizer is not bad, I guess. Apparently it is like the cheapest dry herb vape thing you can get and some say it's actually a combustion device, but it really depends on how you suck on it in my experience. The more you suck the less likely there is to be combustion as the air will pull the herb away from the coil.
The Greenlightvapes vape carts are awesome for thin to thick liquids. They do clog if you have real thick mud.. in that case you'll want to go with the iKrusher JC105 ceramic cart designed for the thickest liquids.
Quartz carts are awesome, but not advisable with DMSO as the smell is terrible.
Both iKrusher and Greenlightvapes claim their test results show heavy metals easily within acceptable limits for health, but they aren't doing the real test which is wait at least 30 days after filling with liquids, burning the liquids up, then testing for heavy metals. However, I've personally vaped with these carts and many others have as well, with nobody reporting an VAPI issues from them, so if VAPI is related to heavy metals, then I guess these are pretty good carts compared to some others.
All the cartridges are 5/10 thread, made of glass, not plastic, and are refillable, with 2.0mm intake holes. I have some childproof ones if you are interested as well (not refillable).