Common features that aid even baking and easy release include anodized aluminum construction for more even heat distribution, non-reactive surfaces that preserve flavor, straight/smooth interior walls for clean edges, and smooth interiors that release better when pans are greased or lined.
Yes—some round cake pans are described with anodized, non-reactive surfaces that help preserve true flavor and prevent discoloration when baking with acidic ingredients.
Baking uses include layer cakes, cheesecakes, tortes, gelatin molds, deep-dish pizza, and individual items like pot pies, quiches, and tarts. Non-baking/decorative uses shown for small galvanized buckets include organizing craft supplies, holding flowers or wrapped candies, and serving as party decor or centerpieces.