Starbucks 2015 Kitten-At-Play Mug, 16 Fl Oz A ceramic coffee mug featuring a cat wrestling with yarn. As playful as a kitten with a ball of yarn, this collectible coffee mug lets you bring a bit of fun wherever you go. The giant green ball of yarn forms the center dot on this Dot Collection mug. Holds 16 fl oz. Dishwasher and microwave safe.