Funny Grumpy Cat Christmas Mug: Sarcastic Holiday Design With Santa Hat & Lights [MG152] Warm-up with a nice cuppa out of this customized ceramic coffee mug. Personalize it with cool designs, photos or logos to make that "aaahhh!" moment even better. It’s BPA and Lead-free, microwave & dishwasher-safe, and made of white, durable ceramic in 11-ounce and 15-ounce sizes. Tags: funny mug,grumpy cat,christmas mug,sarcastic mug,holiday mug,santa hat,cat lovers,festive mug,funny christmas,holiday lights,retro font,cat mug,festive design