Align Technology will donate $1 to Operation Smile for each smiling selfie tagged with #RealSmile on social media to coincide with World Smile Day on October 2.
To participate, just post a picture of a "real smile" to Facebook, Twitter, or Instagram from October 2-4. Align defines a real smile as one that includes your whole face, including teeth.
For each person who posts with the hashtag #RealSmile, Align will donate $1 to Operation Smile, an organization that provides free surgeries to children from around the world with cleft lips and cleft palates.
For more information and submission guidelines, visit the Invisalign website.
