Funny Mug - Nana Definition. Source of hugs and kisses - 11 OZ Coffee Mugs - Funny Inspirational and sarcasm - By QM2U A Mug To Keep is a registered trademark of Fred And Levine. PRINTED ON BOTH SIDES. High quality ceramic. Treat yourself or give as a gift to someone special. Safe for Microwave and dishwasher. Large, easy-grip handle Your satisfaction is guaranteed.