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Two pi r Mug 2pi r better than 1. A reference to the circumference formula. For the math nerd or teacher. Great for PI day, March 14th. $12.95 Qty:    AVAILABILITY: Product Number: 28309434 Product Information The perfect size for your favorite morning beverage or late night brew. Large, easy-grip handle. Treat yourself or give as a gift to someone special. Measures 3.75" tall, 3" diameter Dishwasher and microwave safe