Funny Mug 11OZ - Keep calm or I will use my teacher voice - Math, Sciences, English, Preschool, Spanish, Music, Art, PE, Principal by della Pace della Pace is a Registered Trademark of Yates and Franco. This mug features printing on both sides and it is home and restaurant use, dishwasher and microwave safe. 100% pure white ceramic with money back guarantee, Great gift for coffee addicts who will appreciate for years. This is the perfect gift for them to use in the classroom so your students can see who is the boss. Pick the perfect gift for both men and women with a little sense of humor. It's one of the best funny Valentine's Day gifts for exchange or for a birthday party or even for a tea lover. Everyone surely will all appreciate this gift. Everyone in school will appreciate the effort you made to find this novelty. This is one of the best gift ideas around.