A:Answer Thank you for your question. You can use: metal, ovenproof glass or ceramic bakeware without glass lids in this oven. Be sure that the food or container is at least 1.5 inches away from the top heating element. Do not place flammable materials like cardboard, paper, plastic, etc. in the oven. If using ceramic or glass pans or dishes, make sure they are oven safe to avoid cracking.