Sonic wants you in the club - the Emerald Club! As a recurring object in the Sonic the Hedgehog series, you know how precious these items are. With a black background, the front side of the 11-ounce mug is an image of Sonic's face casting a mischievous grin with the phrase "The Emerald Club" written above. Below Sonic's face is a green emerald with sun-like flowers on the side. The backside has a larger green emerald by itself. Remember that this item is also microwave and dishwasher safe.