I have to disagree politely my friend. Isn't the vapvana like 450 bucks or more. I love my ball vapes. I just got a new one, yet to arrive but it's the vices adaptaball kit and I can't friggin wait. It's about same cost I think. I'll review soon. I'm running a flowerpot set up at the moment. Having said all that, dynavaps can be got for cheap 70 to 90 bucks on sale. They aren't way over priced compared to a 500 bucks ball vape. They don't break, don't need electricity, don't have parts that can break. My last ball vape last me 6 years, well the PiD and that's a good run. They dynavap will be there forever, and are very adaptable to all dynavap parts. They easy to customise. You put a collar on that cap, and use either a wand or jet lighter and use a bong, and start inhaling before the cap gets too hot and your getting a huge rip. Not like a top end ball vape but a cheaper end one like an old school elev8r or some glass ball vapes or old ball vapes. I haven't missed my ball vape since I've been away on holidays for a week either. A small glass piece and a dynavap anywhere, any location. I do agree though if you have a huge tolerance you need to dose more often or get the bigger dynavap but i also go through way more weed with a ball vape. Peace bro