There’s no flip-floppin’ on this deal. It’s a great freebie. Tropical Smoothie Cafe is giving any customer wearing flip-flops a FREE 24-oz. Jetty Punch Smoothie (strawberry and banana) on June 19 from 2 p.m. to 7 p.m. at participating locations. The day has also turned into a mission to raise money for Camp Sunshine. The nonprofit organization provides the only retreat in the nation to address the effects of a life-threatening illness on every member of the immediate family – the ill child, the parents and siblings. If you’re feeling generous, you can donate, although,it’s not necessary to receive the free smoothie. The chain has more than 300 locations in the United States.