There are a few things to keep in mind when purchasing new cookware. First, avoid cookware made of thin aluminum with thin non stick coatings. Cheap aluminum cookware will warp very easily when heated to medium to high heat. The thin non stick coating will very quickly scratch and peel making the pan virtually useless. When the coating starts to peel do not use it as the coating could flake off into your food. Also, the exposed bare aluminum could leave toxic residue on your food.