Container material: cold rolled sheet material. Surrounded by curling design, stable structure, convenient to pick and place, not easy to fall, one-piece design, no joints and dead corners, easy demoulding, and convenient cleaning. Grill rack: stainless steel, thickened steel wire, welded firmly, not easy to rust. Bread rack: It is made by welding process, meticulous workmanship, firm and not falling apart.