The first one...older one.

On its own it's not a good windbreak. The cup fits inside the stove and rests on the bars. The gap around is small. The only hole is the low notch in the stove. That part either faces away from the wind or I sit in front to block the wind. If it's really blowing, I I wrap the whole thing in foil loosely enough for it to get enough air from the bottom. As long as that slot isn't completely covered