I wanted to make a charcoal basket and while at lowes ran across a 9"x13" chimney cap. I bought it and cut the bottom out since i have a grate and ash drawer in my offset box. It is black galvanized steel. I just read online that galvanized steel could produce toxic fumes. Is that true? Thankfully I haven't cooked with it yet if it is a problem. I did do a test burn with it to season it. It worked very well by the way. Any feedback would be appreciated.