Actually, not all that woo-y.
The are exactly like the other ones, but smaller[/b]!!!
Zippo now makes the fluid-type warmer less than half the size of the other ones. About 1 1/2 of the regular zippo lighter sized.
They say they are good for six hours and I played with one last night, and it did over six hours. Easy. If I fill it double-full, I'm sure I can get 10 or more hours out of it.
Like the others, these get HOT. If you leave them out of the pouch, sitting on a table, they will burn you good. In the pouch, or in your pocket, you can regulate how much air it gets, and therefore how hot it gets.
These are a great size. I need more.