Blue ceramic mug with daisy motif

I was at the coffee shop on Last Chance Gulch yesterday around 3pm in downtown Helena, near the Capitol building on East 6th Ave, when I set it down and must have left it there. The mug is a 12-ounce blue ceramic piece with a white interior, hand-painted daisies circling the outside, and a tiny chip on the rim. The base is stamped HB Pottery, and there's a faint glaze crackle that makes it easy to spot. It was a gift from my grandmother and holds a lot of sentimental value; I really need it back.