It's a day to kick back and kick off your shoes. Today is National Flip Flop Day!
And the Tropical Smoothie Cafe is helping customers celebrate.You can get a free 16-ounce limited edition Sunshine smoothie today from 2 p.m. to 7 p.m.
It comes in a special 20th anniversary cup.
But, there's a requirement: you have to be wearing flip-flops.
