Every week, 16 new flavors of frozen yogurt fill So Fun! Frozen Yogurt's coolers, from the cheery orange swirl of mango tart to the decadent savory sweetness of Reese's peanut-butter cup. Customers grab a cup and help themselves to swirls of varied flavors, mixing and matching or sticking with a single base. Next, they progress to a toppings bar, where they layer yogurt with a scoop of cereal for an added crunch or slices of fresh fruit for an easier time smuggling the dessert into the gym. At the register, treats ring up by their weight, rendering the ratio of toppings to yogurt or yogurt to dinner completely up to the customer. Since the yogurt contains calcium, protein, and active live cultures, it can be considered a healthy alternative to many traditional desserts. Sugar-free and dairy-free options also lighten the calorie count.