Value of Pi Wraparound Coffee or Tea Mug - Perfect Math Teacher Gift

This coffee or tea mug sports the correct value of pi to more digits than you're ever likely to need, unless you're calculating missile trajectories. Technicam notitia (the technical bits) Mug holds 11oz / 325ml of your favorite hot or cold beverage.  White exterior and interior. Lead free. Dishwasher and microwave safe. Our lawyer requires us to notify you that if you fill this mug with a hot beverage, the contents may be hot.  We really need to get a better lawyer.