Not a bad way to officially kick off summer-

Tropical Smoothie Cafe has declared tomorrow, June 21, to be National Flip Flop Day, and all stores are giving away a free Jetty Punch to the first 500 customers who show up wearing flip flops.

Personally, every day is flip-flop day.

Edited to add: I stopped by on Saturday around 1PM, expecting a wait, but there was no line. My Jetty Punch (yummy!) was ready within 10 seconds of the cashier taking my order. All in all, I was in store less than sixty seconds, making this one of the best-run promotions of its kind I have experienced.