Re: Be careful with new coconaras....
Tried the new coco shape last night at a friend's place.
They're interesting. I prefer the old shape. The problem we had with them is not the rolling, though they did roll a little when someone took a big draw, but that the ones we used kind of turned into a ball (contributing to the roll). Cause of that, they didn't provide as much heat on the bowl cause the surface area was smaller.
Cause of all that, we had to light up more coals a little more often.
All in all, still a good coal, but I prefer the old shape. More surface area, more heat to the bowl.