Free smoothies to celebrate National Flip Flop Day!

(NBC News) -- Grab your flip flops and get a free smoothie at Tropical Smoothie Cafe for National Flip Flop Day.

Photo: Tropical Smoothie Cafe / Facebook / MGN

National Flip Flop Day is a holiday that was started by Tropical Smoothie Cafe. This year the holiday is celebrated on Friday, June 14.

Wear your favorite pair of flip flops into a Tropical Smoothie Cafe from 2 p.m. until 7 p.m. and you'll receive a free 16 ounce Sunshine Smoothie.

Find a Tropical Smoothie Cafe location near you by clicking the link in our related links section.