Here is the poll for Favorite on demand butane vape previously discussed in this post: http://fuckcombustion.com/threads/your-favorite-on-demand-vape.26312/ I have allowed two votes per user. Please only vote for vapes you have actually used. I will be posting a separate poll for Favorite on demand battery powered unit as well. If I got something wrong or missed something please let me know and we can reset poll. Thanks!