I made a sheild for my esbit stove using triple thick heavy duty aluminium foil. I use it with a MSR Mountain Kettle or a Snow Peaks Ti-Mug, and store it inside my mug or kettle, so that it keeps it shape. Along with keeping the wind from effecting the stove, it decreased burn time by a precevible amount (haven't done a actual test). Even in a canteen cup (not my favorite) it works well.