Starbucks 2009 Anniversary Blend mug featuring the iconic mermaid siren logo in copper-brown tones. This design was a part of the Starbucks collection in 2009, and the siren, a mythological figure, has been a central part of the brand's identity since its early days. The design is inspired by a 16th-century Norse woodcut of a twin-tailed mermaid, and the siren was chosen to symbolize the alluring and irresistible nature of coffee. The mug is made of bone china and is suitable for both microwave and dishwasher use.