In celebration of the first day of summer, Tropical Smoothie Café is hosting its 7th Annual National Flip Flop Day! Today only, you can receive a free 24 oz. Jetty Punch Smoothie when you wear your flip flops to a participating Tropical Smoothie Café between 2 and 7 pm. Tropical Smoothie is raising money for Camp Sunshine and would appreciate donations for the camp. For more information head over here.