Zest is the outer colorful peel of a citrus fruit. It can be removed with a Microplane grater, pairing knife, or vegetable peeler, and it is often added to food to add flavor. The white portion under the zest is known as the pith, and it is typically bitter tasting.
Tri-ply, 5-ply, and even 7-ply cookware has been around for a long time now, and the benefits of this type of cookware is well known. There’s no reason why this technology can’t be transferred to bakeware, and 360 Cookware has done exactly that with their line of bakeware.