The longer the two mix, the more damage can occur. Avoid the big aluminum stock pots and pans, as well as copper, which can also react negatively with tomatoes. Instead, reach for stainless steel ...

To buy: Stainless Steel Stockpot, $70 (originally $110) at amazon.com Featuring an aluminum core that conducts heat quickly and heats the base evenly, this stock pot can do more than deliver a hearty, ...