In South Korea, the 6oz size is primarily used for espresso shots and small cups of hot coffee. This size aligns with the standard serving volume in local cafes, featuring a compact cup design ideal for immediate consumption at the bar or quick sipping. Its smaller capacity prevents flavor and temperature degradation that might occur with larger cups.

8oz is a common size for small cups of American coffee and hot tea in South Korea. Compared to 6oz, 8oz offers a more substantial serving size while maintaining balanced cup proportions, making it ideal for frequently ordered everyday hot beverages.

16oz is primarily used in Brazil for large cold beverages and takeout drinks. In hot climates, consumers prefer to obtain a larger volume in a single serving. The 16oz capacity satisfies continuous drinking needs while avoiding frequent cup changes, making it a common size for large paper cups locally.