How do you know if cookware is stainless or aluminum?

I was one of the people who had this question and since it wasn't answered yet, I dug for my own answers. This is what I've found.

Short answer: A Stainless Steel pot or pan is in many ways better than an aluminum pan, even though aluminum conducts heat better.

Expanded answer: Stainless Steel is one of the best "non-reactive" materials used in cookware. Aluminum is a reactive material which will change the way foods that are made in it look and taste. There are many arguments that aluminum cookware can cause health issues, but from what information I have found, aluminum cookware is safe for use as long as you avoid cooking acidic foods for long periods of time in them. It's also suggested that you don't store acidic food in aluminum pots and pans. Anodized Aluminum is safe to cook acidic foods in as long as there are not any pits and scratches on the surface.

Generally, a Stainless Steel pot will last much longer (sometimes generations) than an aluminum pot. No matter how many scratches and pits the Stainless Steel pot gets it'll always remain non-reactive, so you can cook any type of food in them. For these reasons, I say yes, a stainless steel pot is better than an aluminum one.