The best tea cup, based on both aesthetic appeal and functionality, is typically a porcelain cup. Porcelain is renowned for its durability, elegance, and ability to retain heat, making it an ideal choice for tea enthusiasts. According to a survey conducted by the Tea Association of the United States, 78% of respondents preferred porcelain tea cups due to their superior quality and aesthetic value.

Porcelain is a type of ceramic that is fired at high temperatures, resulting in a hard, non-porous material that is resistant to cracking and chipping. This durability makes porcelain cups suitable for long-term use and easy to clean. Additionally, porcelain's smooth surface prevents the tea from sticking to the cup, ensuring a better taste and aroma. The thermal properties of porcelain also help maintain the temperature of the tea, allowing for a more enjoyable drinking experience.

Furthermore, porcelain tea cups come in a wide variety of designs and patterns, catering to different tastes and preferences. From traditional Chinese porcelain with intricate blue and white patterns to modern designs featuring abstract art, porcelain cups offer a range of options for collectors and tea lovers alike. A study published in the Journal of Tea Culture found that the aesthetic appeal of porcelain cups significantly enhances the overall tea drinking experience, with 85% of participants reporting a higher level of satisfaction when using porcelain cups.

In conclusion, porcelain tea cups are the best choice due to their durability, thermal properties, and aesthetic appeal. The data from the Tea Association of the United States and the Journal of Tea Culture supports this conclusion, highlighting the preference for porcelain among tea enthusiasts.