Which types of milk are only used in big tins?

The correct choice highlights that chocolate and whole milk are typically available in larger containers or tins, primarily due to their popularity and the need for larger quantities in both household consumption and food service industries. Whole milk, being a staple, is often purchased in larger sizes for families, while chocolate milk serves as a preferred beverage especially among children, and thus is also commonly stocked in bigger formats to meet demand.

In contrast, other types of milk, such as almond, soy, coconut, and oat milk, are often packaged in various sizes to cater to diverse consumer preferences, which may include smaller quantities for trials or specific dietary needs. Non-fat and 2% milk can also be found in multiple container sizes, making them versatile for varied uses without being limited to big tins. Therefore, the association of chocolate and whole milk with larger packaging aligns with consumption patterns and market practices.