Funny Mug 11OZ Ph.D. Phd, doctorate, pretty high degree, novelty and gift, dad, by Yates And Franco della Pace is a Registered Trademark of Yates and Franco. This mug features printing on both sides. Resistant for restaurant use, dishwasher and microwave safe. 100% pure white ceramic with money back guarantee. Great gift for coffee addicts and friends who will appreciate for years.