Traditional glass blunts are basically a big, hollow glass tube. They can be hard to keep lit, and generally don’t perform very well.
They Twisty Blunt has a metal spiral on the inside of the chamber that you pack which allows you to slowly push your herb towards the end as it burns.
This allows you to keep the cherry at the edge of the glass and easily ash whenever burnt material burns up. Another benefit is that the hottest part is always as far from your mouth as possible.